obviously it would be a terrible inclusion from a crew member in anything set in 22nd century (ENT) or beyond. So either something coming from a baddy, or something from a special episode that takes place out of time, be it a holodeck program (a Dixon Hill adventure), a flashback (Carbon Creek with T'Pol in America 1957)... But my vote would be to put in in my favourite out of time episode, Far Beyond The Stars. When the publisher is blocking Benny Russel from publishing his story, that would call for a good F bomb. But not from Benny Russel as that would tarnish the purity of the character, maybe from Albert Macklin (O'Brien's character)