Usage History of 'operationists'

The following chart shows how frequently 'operationists' appeared in printed materials over time. For example, the word 'operationists' occurred 4 times in books in 1839 and 175 times in 2008. From 1839 to 2008, the word 'operationists' was used a total of 7,272 times in books scanned by Google. See Reference: Google Ngram project.

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