Usage History of 'microtones'

The following chart shows how frequently 'microtones' appeared in printed materials over time. For example, the word 'microtones' occurred 8 times in books in 1920 and 484 times in 2008. From 1920 to 2008, the word 'microtones' was used a total of 17,480 times in books scanned by Google. See Reference: Google Ngram project.

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