times vs period of time

times and period of time both are nouns.

Word	Noun	Adjective	Verb	Adverb
times	Yes	No	No	No
period of time	Yes	No	No	No

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

Other hypernyms of times include period, time period.

times (noun)	period of time (noun)
an arithmetic operation that is the inverse of division; the product of two numbers is computed	an amount of time
a more or less definite period of time now or previously present