Usage History of 'triols'

The following chart shows how frequently 'triols' appeared in printed materials over time. For example, the word 'triols' occurred 2 times in books in 1787 and 277 times in 2008. From 1787 to 2008, the word 'triols' was used a total of 6,772 times in books scanned by Google. See Reference: Google Ngram project.

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