Usage History of 'trills'

The following chart shows how frequently 'trills' appeared in printed materials over time. For example, the word 'trills' occurred 2 times in books in 1681 and 10,304 times in 2008. From 1681 to 2008, the word 'trills' was used a total of 249,410 times in books scanned by Google. See Reference: Google Ngram project.

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