About how frequently does G visit my site?

[trader]

Always have trouble locating both the MediaBot and GoogleBot in my Webalizer logs, perhaps because it does not list all of the visitor url's?

Anyway, can someone please estimate on a PR6 website with about 2,000 visits/week both the Media Partners Adsense Bot and Google Search Bot come around to visit the site.

I need that information so I can determine how frequently I need to change content and links. Thanks.