Both Uses

quiescent
in
To the Lighthouse
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Once only a board sprang on the landing; once in the middle of the night with a roar, with a rupture, as after centuries of quiescence, a rock rends itself from the mountain and hurtles crashing into the valley, one fold of the shawl loosened and swung to and fro.†
Part 2
That dream, of sharing, completing, of finding in solitude on the beach an answer, was then but a reflection in a mirror, and the mirror itself was but the surface glassiness which forms in quiescence when the nobler powers sleep beneath?†
Part 2 *

Definitions:

(1) (quiescent)
being quiet or still or inactive for the time being

or in medicine: causing no symptoms
(2) (meaning too rare to warrant focus)