Usage History of 'zygosis'

The following chart shows how frequently 'zygosis' appeared in printed materials over time. For example, the word 'zygosis' occurred 2 times in books in 1852 and 58 times in 2008. From 1852 to 2008, the word 'zygosis' was used a total of 2,852 times in books scanned by Google. See Reference: Google Ngram project.

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