Usage History of 'roentgens'

The following chart shows how frequently 'roentgens' appeared in printed materials over time. For example, the word 'roentgens' occurred 2 times in books in 1827 and 324 times in 2008. From 1827 to 2008, the word 'roentgens' was used a total of 63,697 times in books scanned by Google. See Reference: Google Ngram project.

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