Usage History of 'anxiety'

The following chart shows how frequently 'anxiety' appeared in printed materials over time. For example, the word 'anxiety' occurred 4 times in books in 1507 and 1,447,660 times in 2008. From 1507 to 2008, the word 'anxiety' was used a total of 30,557,090 times in books scanned by Google. See Reference: Google Ngram project.

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