A History of Short Words

From the New York Times Crossword Puzzle

ITSOK

Tue, 14 Feb '23
"No worries"
Thu, 28 Apr '22
"No worries"
Wed, 13 Apr '22
"Don't worry"
Sun, 20 Feb '22
Casual response to an apology
Wed, 29 Dec '21
"Not a problem"
Sun, 30 May '21
"No worries"