VARY

Set to 10 different clues across 13 published puzzles, most often “Diversify” — The New York Times, Sunday, 17 May 2009.

4 letters

Every clue on record, most used first

Diversify3 times
The New York Times — Sunday, 17 May 2009
Modulate2 times
The New York Times — Friday, 26 September 2008
Results may do this, in commercialsonce
The New York Times — Tuesday, 4 January 2011
Results may do thisonce
The New York Times — Wednesday, 28 July 2004
Differentiateonce
The New York Times — Monday, 23 December 2002
Be differentonce
The New York Times — Friday, 13 December 2002
Deviateonce
The New York Times — Tuesday, 10 July 2001
"Prices ___"once
The New York Times — Wednesday, 18 October 2000
Shiftonce
The New York Times — Sunday, 10 November 1996
Fluctuateonce
The New York Times — Thursday, 23 May 1996