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What I do when I want to get an idea of how frequently Google crawls a page is I look at when it was last crawled. If the cached date was a long time ago, Google probably doesn't crawl it that often. If it was recently cached, it could mean a more frequent crawl—but it also might be that I just caught it at the right time. So I look at a few similar pages to see if they agree. (To see when a page was cached, do a search on the URL of the page in question—just put the URL right in the search box. In the results, look next to the green URL in the result which is the page you searched for and there is a little green triangle. Click that, and you will see "cached." Choose that, and it will bring up the version of the page that Google has cached, along with the date it was cached.) Don't worry too much. Even without your fixes, Google will figure out the situation on its own and start showing a preferred URL anyway. But yes, it is generally a good choice to show yourself in the best light and follow best practices to make things as easy as possible for Google.