Usage History of 'trigon'

The following chart shows how frequently 'trigon' appeared in printed materials over time. For example, the word 'trigon' occurred 2 times in books in 1677 and 1,067 times in 2008. From 1677 to 2008, the word 'trigon' was used a total of 30,660 times in books scanned by Google. See Reference: Google Ngram project.

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