infrared frequency vs oftenness

infrared frequency and oftenness both are nouns.

Word	Noun	Adjective	Verb	Adverb
infrared frequency	Yes	No	No	No
oftenness	Yes	No	No	No

As nouns, oftenness is a hypernym of infrared frequency; that is, oftenness is a word with a broader meaning than infrared frequency:

infrared frequency: the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
oftenness: the number of occurrences within a given time period

Other hypernyms of infrared frequency include frequence, frequency.

infrared frequency (noun)	oftenness (noun)
the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range	the number of occurrences within a given time period