Usage History of 'hypercapnia'

The following chart shows how frequently 'hypercapnia' appeared in printed materials over time. For example, the word 'hypercapnia' occurred 4 times in books in 1909 and 9,263 times in 2008. From 1909 to 2008, the word 'hypercapnia' was used a total of 249,598 times in books scanned by Google. See Reference: Google Ngram project.

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