Usage History of 'zygosity'

The following chart shows how frequently 'zygosity' appeared in printed materials over time. For example, the word 'zygosity' occurred 2 times in books in 1924 and 924 times in 2008. From 1924 to 2008, the word 'zygosity' was used a total of 39,353 times in books scanned by Google. See Reference: Google Ngram project.

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