What are crawl stats?
The Crawl Stats report (for websites only) provides information on Googlebot's activity on your site for the last 90 days. These stats take into account all content types that we download (such as CSS, JavaScript, Flash, and PDF files, and images).
In general, your Google crawl rate should be relatively stable over the time span of a week or two; if you see a sudden drop, here are a few possible reasons: You added a new (or very broad) robots.txt rule.
The Crawl Stats report (for websites only) provides information on Googlebot's activity on your site for the last 90 days. These stats take into account all content types that we download (such as CSS, JavaScript, Flash, and PDF files, and images).