dosage vs indefinite quantity

dosage and indefinite quantity both are nouns.

Word	Noun	Adjective	Verb	Adverb
dosage	Yes	No	No	No
indefinite quantity	Yes	No	No	No

As nouns, indefinite quantity is a hypernym of dosage; that is, indefinite quantity is a word with a broader meaning than dosage:

dosage: the quantity of an active agent (substance or radiation) taken in or absorbed at any one time
indefinite quantity: an estimated quantity

dosage (noun)	indefinite quantity (noun)
a measured portion of medicine taken at any one time	an estimated quantity
the quantity of an active agent (substance or radiation) taken in or absorbed at any one time