Google continues to visit blogs and websites across the Internet to check for updates. How often a particular blog is visited depends on the quality of the blog or website.
For example, Google might visit your newly created blog once a month, and at the same time, it might snoop into TechCrunch every hour.
Updated blogs with a high Page Rank are visited daily.
The most interesting blogs with a low page rank are tapped once a month.
So it's pretty clear that you can tell how much Google loves you by the frequency of your visit. To hell with visitors, everyone wants Uncle Google to be the main guest on their blog every day. Because if Google enters your blog, visitors will still come.
The question is how to tell when Google recently crawled you.
To check, search for your website name in Google search and click the cached link…
Click the Cache link and you will be taken to a page where the information will be displayed at the top.
The date shown is the last time Google touched you after the update.
So you can easily tell that on October 18th (in the case above) Google's uncle arrived.