SEV
Set to 2 different clues across 4 published puzzles, most often “Unspecified no.” — The New York Times, Thursday, 29 June 2006.
3 letters
Every clue on record, most used first
- Unspecified no.2 times
The New York Times — Thursday, 29 June 2006
- A few: Abbr.2 times
The New York Times — Sunday, 3 July 2005