MMIX
Set to 2 different clues across 2 published puzzles, most often “Year of the swine flu epidemic” — The New York Times, Thursday, 5 August 2010.
4 letters
Every clue on record, most used first
- Year of the swine flu epidemiconce
The New York Times — Thursday, 5 August 2010
- Time of Obama's swearing-inonce
The New York Times — Friday, 1 January 2010