They also come up with a sort of fame speedometer. The ngram data show that people are becoming famous at a younger age, and faster, than they did two generations ago.
Fame is much bigger, too. At one point, the authors write, Bill Clinton’s ngram “was almost exactly as frequent as the word lettuce, twice as frequent as the word cucumber, and about half as frequent as the word tomato. He completely outclassed second-tier vegetables like turnip and cauliflower”
--Wiliam Grimes, NYT, on the changing nature of our fifteen minutes