Have you ever seen a word that is generally rarely used suddenly be used with great frequency, either by a single writer/speaker or by alot of them?

Example 1: in the 2000 Presidential race, "gravitas" was used all the time, but I don't recall it being used prior to or since, at least not significantly.

Example 2: the use of the word "authentic" in reference to someone's character is becoming quite common nowadays. The last time I think it was used this way to this extent was by Martin Hediegger and students of his philosophy in the 30's and 40's.

Any thoughts?