Usage History of 'octagonal'

The following chart shows how frequently 'octagonal' appeared in printed materials over time. For example, the word 'octagonal' occurred 6 times in books in 1575 and 27,661 times in 2008. From 1575 to 2008, the word 'octagonal' was used a total of 925,911 times in books scanned by Google. See Reference: Google Ngram project.

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