gradualness vs graduality

gradualness and graduality both are nouns.

Word	Noun	Adjective	Verb	Adverb
gradualness	Yes	No	No	No
graduality	Yes	No	No	No

As nouns, gradualness and graduality are synonyms defined as:

gradualness and graduality: the quality of being gradual or of coming about by gradual stages

gradualness (noun)	graduality (noun)
the quality of being gradual or of coming about by gradual stages	the quality of being gradual or of coming about by gradual stages
the property possessed by a slope that is very gradual