Usage History of 'stroma'

The following chart shows how frequently 'stroma' appeared in printed materials over time. For example, the word 'stroma' occurred 4 times in books in 1711 and 26,061 times in 2008. From 1711 to 2008, the word 'stroma' was used a total of 1,108,779 times in books scanned by Google. See Reference: Google Ngram project.

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