'frivolity by' is correct and usable in written English
It can be used to describe someone engaging in behavior with a lack of seriousness or importance. For example, "She greeted the news with frivolity by adorning a silly hat and dancing around the room."
It meant conquering frivolity by sitting through earnest sermons and speeches.
High culture, especially, is all too frequently viewed as a dispensable frivolity by far too many politicians.
He wrote very few like it, and usually, even on the comparatively rare occasions when he tried to give it everything, he was led toward frivolity by his fatal propensity for reveling in skill.
"The Green Hornet" isn't a story of adolescence but of an adult who lives as if he were still an adolescent, who is enabled and sustained in his course of ignorant frivolity by his inherited wealth, and who lives in the shadow of his father's achievements.
The wife in question, Sylvia -- played with a nervous frivolity by Andrea Riseborough -- senses a tension between the two men and brings it up to her husband later.
Aside from an energetic, if doomed, push for an immigration agreement with President George W. Bush's administration, he trundled along in a haze of frivolity, punctuated by a streak of malevolence he displayed by trying to block a popular leftist, Andrés Manuel López Obrador, from even running for president.
It was too transparently desperate — unlike the pricey frivolity, backed by real artistic command, of our own Jeff Koons.
But more generally, a "cowboy poetry festival" is just the kind of snark-bait that the Web loves, and also sounds like the kind of program that conservatives have long cited as examples of frivolity enjoyed by society's artsy outliers at the general public's expense.
It was supposed to be the substantive counterpoint to a primary season dominated by frivolity, but Wednesday's national security forum – hosted by NBC and featuring back-to-back appearances by Hillary Clinton and Donald Trump – was nothing of the sort.
He called himself a "functionalist tempered by frivolity".
The inhabitants of the commune were always trying to sweep their neighbors into dubious causes, and it might be a mistake to be seduced by frivolity into some sticky association.
