Usage History of 'obduracies'

The following chart shows how frequently 'obduracies' appeared in printed materials over time. For example, the word 'obduracies' occurred 2 times in books in 1821 and 34 times in 2008. From 1821 to 2008, the word 'obduracies' was used a total of 799 times in books scanned by Google. See Reference: Google Ngram project.

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