prime time vs clock time

prime time and clock time both are nouns.

Word	Noun	Adjective	Verb	Adverb
prime time	Yes	No	No	No
clock time	Yes	No	No	No

As nouns, clock time is a hypernym of prime time; that is, clock time is a word with a broader meaning than prime time:

prime time: the hours between 7 and 11 p.m. when the largest tv audience is available
clock time: a reading of a point in time as given by a clock

Other hypernyms of prime time include time.

prime time (noun)	clock time (noun)
the hours between 7 and 11 p.m. when the largest tv audience is available	a reading of a point in time as given by a clock