Usage History of 'protectorate'

The following chart shows how frequently 'protectorate' appeared in printed materials over time. For example, the word 'protectorate' occurred 2 times in books in 1515 and 58,373 times in 2008. From 1515 to 2008, the word 'protectorate' was used a total of 2,430,551 times in books scanned by Google. See Reference: Google Ngram project.

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