We only dated once in a while over the winter.
He and Penny dated once at the beginning of the season.
A boy I was dating once offered to cook me dinner.
They were thought to be dating once, but it turned out she was only tutoring him.
"If they've only dated once or twice, it's probably more prudent not to say anything."
They tried dating once, but it didn't work out.
We do learn that she once dated a musician who wrote a song about her which became a nationwide hit.
It is said that he once dated a girl, that later left him and had her own kid with a different man.
Pierre refers to the fact that he and Alex were once dating, but are no longer in a relationship.
Once dated, it gives valuable information about changes of climate and terrain.