Fairly rarely...

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($20.95)
Hero ($26.45)
MP ($16.80)
CO ($8.70)
Button ($65.95)
SB ($14.25)

Preflop: Hero is UTG with K, K.
Hero raises to $1, 2 folds, Button raises to $3, 1 fold, BB raises to $10, Hero ..

I think that is a fairly easy fold..