Thanks, Sam. Google has a pretty nifty ngram tool that shows the trends of any given phrase over time, based on the massive collection in Google Books. I can also use to compare the relative frequencies of selected words or phrases, e.g., "The Three Musketeers" vs "The Three Stooges".
But it doesn't get me insights into the most common phrases, which is what I'm after. Is there a way to get there? All I can say is, "I don't know".
David