14 ___ Prize (satirical scientific award since 1991)
By our lazy count, this is the sixth time the Ig Nobel Prizes have appeared in a major crossword puzzle (if there is such a thing as a major crossword puzzle) in an English-language publication. The Week used it in their puzzle on October 19, 2015. The New York Times used it in their puzzle on December 20, 2020. The Wall Street Journal used it in their puzzle January 23, 2021. The New Yorker used it in their puzzle April 5, 2021. The Los Angeles Times used it in their puzzle on September 4, 2021.
The Igs have also been an answer on the Jeopardy! TV program eight times or so.
All of this is, of course, puzzling.
(Thanks to the many people who brought it to our attention.)