Usage History of 'irrationality'

The following chart shows how frequently 'irrationality' appeared in printed materials over time. For example, the word 'irrationality' occurred 2 times in books in 1607 and 30,101 times in 2008. From 1607 to 2008, the word 'irrationality' was used a total of 859,476 times in books scanned by Google. See Reference: Google Ngram project.

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