COSET
Set to 3 different clues across 3 published puzzles, most often “Mathematical grouping” — The New York Times, Saturday, 9 December 2006.
5 letters
Every clue on record, most used first
- Mathematical groupingonce
The New York Times — Saturday, 9 December 2006
- Mathematical subgrouponce
The New York Times — Sunday, 2 April 2000
- Algebraic groupingonce
The New York Times — Tuesday, 8 October 1996