Usage History of 'doping'

The following chart shows how frequently 'doping' appeared in printed materials over time. For example, the word 'doping' occurred 4 times in books in 1676 and 59,562 times in 2008. From 1676 to 2008, the word 'doping' was used a total of 1,133,459 times in books scanned by Google. See Reference: Google Ngram project.

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