Usage History of 'tetraspore'

The following chart shows how frequently 'tetraspore' appeared in printed materials over time. For example, the word 'tetraspore' occurred 2 times in books in 1847 and 14 times in 2008. From 1847 to 2008, the word 'tetraspore' was used a total of 4,509 times in books scanned by Google. See Reference: Google Ngram project.

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