Usage History of 'unfrivolous'

The following chart shows how frequently 'unfrivolous' appeared in printed materials over time. For example, the word 'unfrivolous' occurred 8 times in books in 1875 and 24 times in 2008. From 1875 to 2008, the word 'unfrivolous' was used a total of 1,931 times in books scanned by Google. See Reference: Google Ngram project.

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