Usage History of 'tetrahedrons'

The following chart shows how frequently 'tetrahedrons' appeared in printed materials over time. For example, the word 'tetrahedrons' occurred 4 times in books in 1778 and 1,907 times in 2008. From 1778 to 2008, the word 'tetrahedrons' was used a total of 43,739 times in books scanned by Google. See Reference: Google Ngram project.

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