A History of Short Words

From the New York Times Crossword Puzzle

HENS

Fri, 12 Aug '22
No cock-a-doodle-doo-ers
Sun, 6 Feb '22
___ teeth (proverbial rarity)
Wed, 19 Jan '22
Ones tending to brood?
Mon, 19 Jul '21
Scarce as ___ teeth
Fri, 15 Jan '21
Nested layers?