MODULE

Set to 4 different clues across 4 published puzzles, most often “Computer program subsection” — The New York Times, Saturday, 25 September 2010.

6 letters

Every clue on record, most used first

Computer program subsectiononce
The New York Times — Saturday, 25 September 2010
Interchangeable unitonce
The New York Times — Thursday, 24 August 2006
NASA componentonce
The New York Times — Saturday, 5 March 2005
Lunar___once
The New York Times — Sunday, 11 February 1996