All 3 Uses

vary
in
Frankenstein - 1831 version
(Edited)

I believe it to be an intuitive discernment, a quick but never-failing power of judgment, a penetration into the causes of things, unequalled for clearness and precision; add to this a facility of expression and a voice whose varied intonations are soul-subduing music.
p. 30.9

varied = differing
Were we among the tamer scenes of nature I might fear to encounter your unbelief, perhaps your ridicule; but many things will appear possible in these wild and mysterious regions which would provoke the laughter of those unacquainted with the ever-varied powers of nature; nor can I doubt but that my tale conveys in its series internal evidence of the truth of the events of which it is composed.
p. 31.4

varied = differing (having a variety)
After so long a period of an absorbing melancholy that resembled madness in its intensity and effects, he was glad to find that I was capable of taking pleasure in the idea of such a journey, and he hoped that change of scene and varied amusement would, before my return, have restored me entirely to myself.
p. 158.2 *

varied = variety of

Definitions:

(1) (vary)
to be different, or to change

Vary is often used to describe small differences or changes--especially about things of the same type. It would be more common to say "The weight of full-grown elephants varies depending upon diet and other factors," than to say "The weight of elephants varies from that of mice."
(2) (meaning too rare to warrant focus)