With this plugin you can optimize your WordPress blog for search engines. 
It can automatically generate meta informations (like keywords and description for example) needed for the search engine optimization (SEO) of your blog.
The Keyword-Statistics-Plugin checks the content of a post or a page for keyword density (single words and optionally 2- and 3-word phrases; for each the 1-10 most commonly used can be displayed). 
It can update its informations automatically while the author is writing his content in a variable interval (every 1-10 seconds) or manually by clicking on a button. 
The script comes with english and german stopwords, which optionally can be filtered out before calculating the keyword densities. 
Moreover the commonest keywords are extracted in a list as a META keywords suggestion. 
Based on this list a META description can be created and automatically set. 
So the plugin can be used to do the on-page part of your SEO strategy.
Features:
<ul>
<li>Keyword density statistics about the usage of single keywords and keyphrases (2- and 3-words)</li>
<li>Setting an individual title for each page and post</li>
<li>META keywords will be set automatically based on the page content</li>
<li>META description generated from content based on the keyword statistics</li>
<li>Definition of individual titles, keywords and descriptions for all kinds of content aggregations. A set of variables that can be used on the specific aggregations – keywords will be filled up automatically to the maximum number of keys (you can define this too) with the ones generated from the listed posts.</li>
<li>Predecessors and successors that will be added to all page titles and descriptions served by your blog</li>
<li>Sitewide definition of meta keywords that will appear at the end or the beginning of the keyword list on each page of your blog – in addition to the ones defined for single posts or pages and at the various aggregations keyword lists.</li>
<li>Page-specific control of robots META</li>
<li>Generation of Canonical URLs – also for all kinds of content aggregation (lists with last posts, archive, tag, category, search results and author including pagination)</li>
<li>Controls the index/follow settings of the content aggregations (full control of robots for the specific aggregations)</li>
<li>Configuration of ODP, Yahoo! Directory and ARCHIVE (archiving of the content for search engines like google but also at archive.org) META</li>
<li>Prevents urls resulting in a not found response (404) from indexation</li>
<li>All meta tags generated by the plugin can be switched off separately to prevent collisions with other plugins</li>
<li>Using nonces for plugins security</li>
<li>Allow or deny indexation of the blogs feeds</li>
</ul>
Stopwords filtered for:
<ul>
<li>Brazilian Portoguese</li>
<li>Bulgarian</li>
<li>Czech</li>
<li>Danish</li>
<li>Dutch</li>
<li>English</li>
<li>French</li>
<li>German</li>
<li>Hungarian</li>
<li>Polish</li>
<li>Slovak</li>
<li>Spanish</li>
<li>Turkish</li>
</ul>
Backend translations for:
<ul>
<li>English</li>
<li>German</li>
<li>Slovak</li>
</ul>
Please notify: The SEO-relevant meta-information (meta keywords, meta description and the robots meta-tag) will be generated – and served – only for pages and posts which are saved after plugin installation. 
You have to open and save an older post or page if you want to generate the meta data for the particular content. 
For now there is no way to do this automatically.
The administrator can allow ordinary authors to change META informations or not. 
Even if changing is disallowed an author can see the keyword density and can be guided from the statistics while he is writing the content. 
He can do the on-page search engine optimization incidentally by knowing which keyword density should be reached. 
This makes SEO easier for authors.
Learn more about this plugin on <a href="http://www.keyword-statistics.net/wordpress-plugin.html" rel="nofollow ugc">keyword statistics plugin</a> – <a href="http://www.keyword-statistics.net/de/wordpress-plugin.html" rel="nofollow ugc">german</a>

Keyword Statistics

This SEO plugin checks the content of posts/pages for the keyword density (single/phrases) while writing and is automatically setting the META-tags.

This SEO plugin is automatically generating an overview about the keyword densities of the used keywords and 2-/3-word keyphrases in the pages / posts content. 
The statistics will be updated in a specific interval while the author is writing the text in edit-post and edit-page dialog. 
These informations have informational character only – no meta information will be inserted into your blogs pages. 
You can use the meta keyword suggestion at the bottom of the statistics to copy these informations into the input fields of your favourite SEO plugin. 
Stopwords for different languages can be filtered out of the text before the keywords densities will be calculated. 
The keyword density checker tool is a branch of the <a href="http://www.keyword-statistics.net/wordpress-plugin.html" rel="nofollow ugc">keyword statistics plugin</a>. 
If you don’t need the meta stuff the keyword density checker is much faster – no code will be executed on ordinary pageviews. 
The additional code is needed in page-/post-edit mode of admins and authors only.
Features of the SEO-Tool:
<ul>
<li>Automatic calculation of the keyword density for single keywords and keyphrases (2- and 3-words) while writing the content</li>
<li>Meta keywords suggestion depending on the pages/posts content</li>
<li>Language specific stopword lists</li>
<li>Optional filter for stopwords</li>
<li>Update interval for the statistics generation can be changed and switched off</li>
<li>Generation of statistics for 2- and 3-word phrases can be deactivated</li>
<li>Definition of the default language and stopword filter status for authors</li>
<li>Prevent authors and contributors from changing the content language and stopword filter status</li>
<li>Uses nonces for plugins security</li>
</ul>
Integrated stopwords for:
<ul>
<li>Brazilian Portoguese</li>
<li>Bulgarian</li>
<li>Czech</li>
<li>Danish</li>
<li>Dutch</li>
<li>English</li>
<li>French</li>
<li>Hungarian</li>
<li>German</li>
<li>Polish</li>
<li>Slovak</li>
<li>Spanish</li>
<li>Turkish</li>
</ul>
Backend translations for:
<ul>
<li>English</li>
<li>German</li>
</ul>
Read more about this SEO plugin on <a href="http://www.keyword-statistics.net/wordpress-keyword-density-checker.html" rel="nofollow ugc">keyword density checker</a> – <a href="http://www.keyword-statistics.net/de/wordpress-keyworddichte-plugin.html" rel="nofollow ugc">german</a>

SEO-Tool – Keyword Density Checker

This SEO-Tool provides a keyword analyzer calculating the keyword density of the page/post content and generating statistics for keywords and phrases.

Keyword Statistics vs SEO-Tool – Keyword Density Checker