Usage History of 'cyanins'

The following chart shows how frequently 'cyanins' appeared in printed materials over time. For example, the word 'cyanins' occurred 4 times in books in 1900 and 20 times in 2008. From 1900 to 2008, the word 'cyanins' was used a total of 478 times in books scanned by Google. See Reference: Google Ngram project.

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