pace vs quick time

pace and quick time both are nouns.

Word	Noun	Adjective	Verb	Adverb
pace	Yes	No	Yes	No
quick time	Yes	No	No	No

As nouns, quick time is a hyponym of pace; that is, quick time is a word with a more specific, narrower meaning than pace:

Other hyponyms of pace include double time.

pace (noun)	quick time (noun)
a step in walking or running	a normal marching pace of 120 steps per minute
the relative speed of progress or change
a unit of length equal to 3 feet; defined as 91.44 centimeters; originally taken to be the average length of a stride
the distance covered by a step
the rate of moving (especially walking or running)
the rate of some repeating event