Usage History of 'testacean'

The following chart shows how frequently 'testacean' appeared in printed materials over time. For example, the word 'testacean' occurred 2 times in books in 1788 and 34 times in 2008. From 1788 to 2008, the word 'testacean' was used a total of 1,320 times in books scanned by Google. See Reference: Google Ngram project.

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