Both Uses

trivial
in
Sula
(Auto-generated)

Although most of the people remembered the time when the sky was black for two hours with clouds and clouds of pigeons, and although they were accustomed to excesses in nature—too much heat, too much cold, too little rain, rain to flooding—they still dreaded the way a relatively trivial phenomenon could become sovereign in their lives and bend their minds to its will.†
Chpt 1937

trivial = unimportant
Sula, like always, was incapable of making any but the most trivial decisions.†
Chpt 1937 *

Definitions:

(1) (trivial)
of little importance -- sometimes more specifically describing a challenge as easy and uninteresting
(2) (meaning too rare to warrant focus)