Doctor Bashir: Nervous, Chief?
Miles O’Brien: What are you talking about?
Doctor Bashir: That’s your fifth cup of coffee in twenty minutes.
Miles O’Brien: I didn’t realize you were keeping track.
Doctor Bashir: Oh, nervous and irascible.
Miles O’Brien: If you hadn’t seen your wife and child for two months, you’d be irascible too.
Doctor Bashir: Well, believe me, I’m looking forward to Keiko and Molly’s visit as much as you are.
Miles O’Brien: Ha, I doubt that.
Doctor Bashir: How many games of raquetball have we played in the last two months?
Miles O’Brien: I don’t know. Fifteen, maybe twenty.
Doctor Bashir: Try seventy. I’ve been keeping track of that, too, and do you know what all those games have proved to me? That I’m a poor substitute for your wife.
Miles O’Brien: I could have told you that sixty games ago.

Star Trek: Deep Space Nine, Season 3, Episode 10 – “Fascination”