Usage History of 'cholangiogram'

The following chart shows how frequently 'cholangiogram' appeared in printed materials over time. For example, the word 'cholangiogram' occurred 8 times in books in 1920 and 1,233 times in 2008. From 1920 to 2008, the word 'cholangiogram' was used a total of 50,773 times in books scanned by Google. See Reference: Google Ngram project.

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