Usage History of 'cotan'

The following chart shows how frequently 'cotan' appeared in printed materials over time. For example, the word 'cotan' occurred 24 times in books in 1723 and 495 times in 2008. From 1723 to 2008, the word 'cotan' was used a total of 22,050 times in books scanned by Google. See Reference: Google Ngram project.

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