A History of Short Words

From the New York Times Crossword Puzzle

CPR

Sun, 12 Nov '23
It can be a lifesaver, in brief
Sun, 8 Oct '23
Skill practiced on a manikin, for short
Tue, 8 Aug '23
Red Cross training subject, in brief
Sun, 21 Mar '21
Part of lifeguard training
Fri, 5 Mar '21
E.R. procedure that can be done to the beat of "Stayin' Alive"
Sat, 13 Feb '21
Breathing exercises, in brief?