Usage History of 'nephogram'

The following chart shows how frequently 'nephogram' appeared in printed materials over time. For example, the word 'nephogram' occurred 1 time in books in 1964 and 4 times in 2008. From 1964 to 2008, the word 'nephogram' was used a total of 71 times in books scanned by Google. See Reference: Google Ngram project.

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