Under the 'top search queries' on Google webmaster, it shows all the search phrases a site has ranked for. As we know, this shows the highest rank a site achieved for a particular keyword. Quite often a site will get a temporary rank for a keyword whilst Google decides what to do with the site. The Webmaster tools will show this fact, even if the site has been dropped for that specific keyword. Now here's my question; once Google has associated that keyword with your site - how easy is it to rank for that keyword again?