A History of Short Words

From the New York Times Crossword Puzzle

BUSY

Fri, 6 Oct '23
Kind of signal
Fri, 25 Aug '23
Opposite of plain
Fri, 30 Jun '23
Tied up
Mon, 7 Nov '22
Kind of phone signal that's nearly obsolete
Thu, 10 Mar '22
Tied up
Tue, 29 Jun '21
Occupied with many things