Usage History of 'zygospores'

The following chart shows how frequently 'zygospores' appeared in printed materials over time. For example, the word 'zygospores' occurred 76 times in books in 1872 and 524 times in 2008. From 1872 to 2008, the word 'zygospores' was used a total of 32,824 times in books scanned by Google. See Reference: Google Ngram project.

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