A History of Short Words

From the New York Times Crossword Puzzle

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Mon, 19 Jun '23
On the house
Wed, 14 Jun '23
Not doing anything
Sat, 13 May '23
Priceless?
Fri, 30 Dec '22
Not doing anything
Sat, 1 Oct '22
Unfettered
Fri, 30 Sep '22
Not busy
Mon, 16 May '22
Middle square on a bingo card
Mon, 23 Aug '21
Gratis
Wed, 28 Jul '21
Unoccupied