STILLE

Set to 3 different clues across 4 published puzzles, most often "___ Nacht" (German carol) — The New York Times, Wednesday, 25 February 2009.

6 letters

Every clue on record, most used first

"___ Nacht" (German carol)2 times
The New York Times — Wednesday, 25 February 2009
"___ Nacht" (Christmas carol)once
The New York Times — Wednesday, 2 February 2011
"___ Nacht" (German Christmas carol)once
The New York Times — Sunday, 28 September 1997