Usage History of 'univalve'

The following chart shows how frequently 'univalve' appeared in printed materials over time. For example, the word 'univalve' occurred 4 times in books in 1738 and 1,209 times in 2008. From 1738 to 2008, the word 'univalve' was used a total of 43,297 times in books scanned by Google. See Reference: Google Ngram project.

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