Usage History of 'classis'

The following chart shows how frequently 'classis' appeared in printed materials over time. For example, the word 'classis' occurred 72 times in books in 1607 and 4,061 times in 2008. From 1607 to 2008, the word 'classis' was used a total of 204,199 times in books scanned by Google. See Reference: Google Ngram project.

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