CCED

Set to 4 different clues across 4 published puzzles, most often “E-mailed a dupe to” — The New York Times, Wednesday, 13 October 2010.

4 letters

Every clue on record, most used first

E-mailed a dupe toonce
The New York Times — Wednesday, 13 October 2010
Sent duplicates to, brieflyonce
The New York Times — Sunday, 13 February 2005
Sent a duplicate, brieflyonce
The New York Times — Saturday, 3 July 2004
Made an additional recipient, for shortonce
The New York Times — Sunday, 17 February 2002