infrared frequency vs frequency

infrared frequency and frequency both are nouns.

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

As nouns, frequency is a hypernym of infrared frequency; that is, frequency 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
frequency: the number of occurrences within a given time period

Other hypernyms of infrared frequency include frequence, oftenness.

infrared frequency (noun)	frequency (noun)
the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range	the number of observations in a given statistical category
	the ratio of the number of observations in a statistical category to the total number of observations
	the number of occurrences within a given time period