Dear megafrog,

Cute name. Would love to know the derivation!

Prime time would be the time of day, generally between 7 and 11 pm, when the television audience would be the greatest.

I can't think of numerous examples of applications of prime time as an adjective, but here are some obvious ones:

prime time television
prime time audience
prime time viewers
prime time listeners
prime time viewing habits
prime time television show surveys
prime time news


...that kind of application.

Hope this is roughly what you're looking for. If not, just clarify your question.

Best regards,
WW