A History of Short Words

From the New York Times Crossword Puzzle

PECS

Wed, 9 Nov '22
Push-up targets, for short
Mon, 31 Oct '22
Chest muscles, for short
Wed, 21 Sep '22
Bench press muscles, informally
Sun, 17 Jul '22
Benching targets, informally
Thu, 25 Mar '21
They can be found just above a six-pack
Sat, 6 Feb '21
Nice pair of boxers?