Usage History of 'pentaploid'

The following chart shows how frequently 'pentaploid' appeared in printed materials over time. For example, the word 'pentaploid' occurred 2 times in books in 1907 and 197 times in 2008. From 1907 to 2008, the word 'pentaploid' was used a total of 11,755 times in books scanned by Google. See Reference: Google Ngram project.

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