Usage History of 'irrefragable'

The following chart shows how frequently 'irrefragable' appeared in printed materials over time. For example, the word 'irrefragable' occurred 2 times in books in 1621 and 8,653 times in 2008. From 1621 to 2008, the word 'irrefragable' was used a total of 173,950 times in books scanned by Google. See Reference: Google Ngram project.

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