This calendar view maps the number of times http://www.skepticalscience.com/Rebutting-skeptic-arguments-in-a-single-tweet.html was crawled by the Wayback Machine, not how many times the site was actually updated.
This calendar view maps the number of times http://www.skepticalscience.com/article.php?a=2369 was crawled by the Wayback Machine, not how many times the site was actually updated.