Chris A. a11n

This plugin requires PHP 5.3 or later, please check with your web host if you’re unsure.
Adoption uses the timezone that is set in the WordPres admin panel. Ensure you have set your local timezone in Settings > General.
Features:
<ul>
<li>Displays a bar chart with registration statistics for predetermined time periods (e.g. this week, last week, last 3 months, last 12 months, etc.)</li>
<li>Displays a “Quick Statistics” section which includes a summary of user registrations for popular time periods.</li>
<li>Easy to use, tidy and fits in with the overall WordPress user interface.</li>
</ul>

Adoption

Adoption displays user registration statistics in a neat dashboard widget

shortdark

This plugin looks at the volume of posts in each category, tag, the volume of posts per year, month, day-of-the-month, day-of-the-week, hour, author, number of words-per-post and the number of days between posts. You can specify a year and/or an author to just look at the post volume stats for that year/author. The bar and pie charts can be added to a sidebar with Post Volume Stats widget. Lists and line graphs can be exported to a new post to show the change in category, tag and custom taxonomy posts over the years. You can also export the “Compare Years” data into a CSV spreadsheet. The latest feature is the “Date Range” page which applies a date range to the data on the main page.
Please let me know if you like this plugin by <a href="https://wordpress.org/plugins/post-volume-stats/" rel="ugc">leaving a review</a>.
Go to the <a href="https://www.postvolumestats.com/" rel="nofollow ugc">Post Volume Stats website</a> for more information.
<h4>Translations</h4>
You can translate Post Volume Stats on <a href="https://translate.wordpress.org/projects/wp-plugins/post-volume-stats" rel="nofollow ugc">translate.wordpress.org</a>.

Post Volume Stats

With dozens of authors and posts per day, this plugin gives a very nice overview of who does what and when.

Very nice plugin

Shows stats for the volume of posts per year, month, day-of-the-month, day-of-the-week, hour-of-the-day, words per post, days between posts, author, c …

Adoption vs Post Volume Stats