occupation vs time period

occupation and time period both are nouns.

Word	Noun	Adjective	Verb	Adverb
occupation	Yes	No	No	No
time period	Yes	No	No	No

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

occupation: the period of time during which a place or position or nation is occupied
time period: an amount of time

Other hypernyms of occupation include period, period of time.

occupation (noun)	time period (noun)
the principal activity in your life that you do to earn money	an amount of time
the act of occupying or taking possession of a building
the control of a country by military forces of a foreign power
any activity that occupies a person's attention
the period of time during which a place or position or nation is occupied