AGOD

Set to 3 different clues across 5 published puzzles, most often “Steinbeck's "To ___ Unknown"” — The New York Times, Sunday, 22 April 2007.

4 letters

Every clue on record, most used first

Steinbeck's "To ___ Unknown"2 times
The New York Times — Sunday, 22 April 2007
"Yes, there is ___!"2 times
The New York Times — Friday, 1 January 1999
"This man is now become _____":"Julius Caesar"once
The New York Times — Sunday, 24 September 1995