A History of Short Words

From the New York Times Crossword Puzzle

CHEX

Sat, 14 Sep '24
Puppy chow ingredient
Mon, 4 Mar '24
Cereal in a party mix
Tue, 29 Nov '22
___ Mix
Sun, 12 Dec '21
Party mix ingredient
Fri, 12 Feb '21
It may be added to the mix