Usage History of 'trapezial'

The following chart shows how frequently 'trapezial' appeared in printed materials over time. For example, the word 'trapezial' occurred 6 times in books in 1754 and 174 times in 2008. From 1754 to 2008, the word 'trapezial' was used a total of 6,779 times in books scanned by Google. See Reference: Google Ngram project.

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