Perving over something in the past. English conj: "perving" and "previously".
Perviously looking at the photo, she realised that core classes weren't such a bad idea after all.
Perving at an earlier point in time. Combination: English language "perving" and "previously".
May also be a typo which someone is now trying to get round by adding it to a dictionary.
She perviously looked at the photo and realised that yes, core classes were definitely worth doing.