Usage History of 'rarefactions'

The following chart shows how frequently 'rarefactions' appeared in printed materials over time. For example, the word 'rarefactions' occurred 2 times in books in 1704 and 957 times in 2008. From 1704 to 2008, the word 'rarefactions' was used a total of 52,784 times in books scanned by Google. See Reference: Google Ngram project.

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