I'm curious if anyone has any idea as to how often Google will refresh its data on your site, crawling from the front page throughout all the links and removing old urls if they are no longer linked. Say the site has a high PR and it is crawled frequently. The reason I'm wondering is because I have removed a lot of data driven empty results pages but even though there are no links to them in the site anymore, if google goes straight to each url to crawl again it will still get a page because of the rewrites.
it's related with your page rank and backlinks . if you have strong backlinks , time will be shorter . and you must help google with sending a sitemap
In addition to PR, the more frequent you update your site, the faster you will see the bots revisiting.
My site used to be visited about once every month. I now get visits every other day, or so. Since I have backlinked, and spread my site link, indexing has become much more friendly.
Google visits the site frequently.. usually every couple days... what I was trying to ask is how often does Google do away with old interior links it has indexed and rebuild its index from you front page linking out.