Usage History of 'eutherians'

The following chart shows how frequently 'eutherians' appeared in printed materials over time. For example, the word 'eutherians' occurred 2 times in books in 1884 and 453 times in 2008. From 1884 to 2008, the word 'eutherians' was used a total of 20,017 times in books scanned by Google. See Reference: Google Ngram project.

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