linage vs charge per unit

linage and charge per unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
linage	Yes	No	No	No
charge per unit	Yes	No	No	No

As nouns, charge per unit is a hypernym of linage; that is, charge per unit is a word with a broader meaning than linage:

linage: a rate of payment for written material that is measured according to the number of lines submitted
charge per unit: amount of a charge or payment relative to some basis

Other hypernyms of linage include rate.

linage (noun)	charge per unit (noun)
a rate of payment for written material that is measured according to the number of lines submitted	amount of a charge or payment relative to some basis
the number of lines in a piece of printed material