Here's an app version of this xkcd comic that lets you plot the frequency of phrases according to Google searches.
Permalink to this chart
Some examples below the fold.
Most frequent birth year: 1982
What you've got
Mind your phone
Post permalinks to your favorites in the comments below.
Disclaimers: The number of search results reported by Google's search API is known to be occasionally bogus and is not a reliable indicator of anything in particular. Also, there's some bug here if you do a range query with only a single value. Finally, an exclamation point in the status message indicates an error in one query or the lack of any results.