I understand that the imparfait is used for ongoing past actions, background actions, and descriptions. And I know the passe compose is for completed actions. However there are two songs with lyrics that use the passe compose and I'm not sure why.
The first is "On a vu souvent" I learned that imparfait is often used with souvent. So why is it not the case here?
The second is " Je n'ai jamais eu la chance a d'etre sa copine" I'm of the understanding that the passe compose can describe a specified number of completed actions. If that's the case, are the lyrics talking about one specific event?