Enter a clue or pattern or both:
The Clue
Infrequent: Abbr. (3 letter answer)
The Answer
OCC
Tags
Notes
The answer OCC is so rare that it appears less than once every 2900 puzzles.
Related Clues
Lifework: Abbr.
Vocation: Abbr.
Line of work: Abbr.
Now and then: Abbr.