Usage History of 'researcher'

The following chart shows how frequently 'researcher' appeared in printed materials over time. For example, the word 'researcher' occurred 2 times in books in 1645 and 423,544 times in 2008. From 1645 to 2008, the word 'researcher' was used a total of 7,812,110 times in books scanned by Google. See Reference: Google Ngram project.

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