Usage History of 'tetraploidies'

The following chart shows how frequently 'tetraploidies' appeared in printed materials over time. For example, the word 'tetraploidies' occurred 2 times in books in 1969 and 32 times in 2008. From 1969 to 2008, the word 'tetraploidies' was used a total of 170 times in books scanned by Google. See Reference: Google Ngram project.

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