Usage History of 'lignan'

The following chart shows how frequently 'lignan' appeared in printed materials over time. For example, the word 'lignan' occurred 2 times in books in 1722 and 893 times in 2008. From 1722 to 2008, the word 'lignan' was used a total of 14,716 times in books scanned by Google. See Reference: Google Ngram project.

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