A History of Short Words

From the New York Times Crossword Puzzle

KETO

Sun, 21 Aug '22
Kind of high-fat diet used as an epilepsy therapy
Thu, 11 Aug '22
Low-carb kind of diet
Thu, 7 Apr '22
Certain high-fat, low-carb diet, informally
Tue, 3 Aug '21
Low-carb kind of diet