I am curious as to how often Search engine bot crawls a site? I setup a new blog and a few days later most of my posts were indexed, but I changed my title description format for all posts and pages and Google hasn't crawled my pages yet. I checked now and Yahoo has for most of them, so does yahoo crawl my site more often than google, and if so, what can i do to change this? I really need Google to crawl my site more often because I constantly make changes to content and url. Any help would be greatly appreciated thank you!