I can remember when we were on the first page of Google for "sex" - way back before they started censoring their results in the English index for political correctness
Those daily hits would make any counter spin - funny thing was - it was great for traffic to trade - but sales were worse than the most targetted skimming TGP we ran
I agree that looking at 2 words and up is good - there are a few single words that provide some targetted traffic but I think Ill keep those to myself
Remember that how you write your description meta (the part Google usually shows in its results) can be the difference between someone clicking on your listing or someone elses