arrival time vs time of arrival

arrival time and time of arrival both are nouns.

Word	Noun	Adjective	Verb	Adverb
arrival time	Yes	No	No	No
time of arrival	Yes	No	No	No

As nouns, arrival time and time of arrival are synonyms defined as:

arrival time and time of arrival: the time at which a public conveyance is scheduled to arrive at a given destination

arrival time (noun)	time of arrival (noun)
the time at which a public conveyance is scheduled to arrive at a given destination	the time at which a public conveyance is scheduled to arrive at a given destination