Usage History of 'prehumans'

The following chart shows how frequently 'prehumans' appeared in printed materials over time. For example, the word 'prehumans' occurred 2 times in books in 1913 and 163 times in 2008. From 1913 to 2008, the word 'prehumans' was used a total of 4,442 times in books scanned by Google. See Reference: Google Ngram project.

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