Usage History of 'interbreeding'

The following chart shows how frequently 'interbreeding' appeared in printed materials over time. For example, the word 'interbreeding' occurred 4 times in books in 1773 and 7,449 times in 2008. From 1773 to 2008, the word 'interbreeding' was used a total of 208,500 times in books scanned by Google. See Reference: Google Ngram project.

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