CMS
Set to 2 different clues across 2 published puzzles, most often “Ruler units: Abbr.” — The New York Times, Sunday, 18 January 2009.
3 letters
Every clue on record, most used first
- Ruler units: Abbr.once
The New York Times — Sunday, 18 January 2009
- Ruler amts.once
The New York Times — Sunday, 4 July 2004