Usage History of 'credulous'

The following chart shows how frequently 'credulous' appeared in printed materials over time. For example, the word 'credulous' occurred 2 times in books in 1520 and 44,725 times in 2008. From 1520 to 2008, the word 'credulous' was used a total of 955,852 times in books scanned by Google. See Reference: Google Ngram project.

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