Usage History of 'protostelic'

The following chart shows how frequently 'protostelic' appeared in printed materials over time. For example, the word 'protostelic' occurred 2 times in books in 1894 and 12 times in 2008. From 1894 to 2008, the word 'protostelic' was used a total of 5,574 times in books scanned by Google. See Reference: Google Ngram project.

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