Usage History of 'ornithischian'

The following chart shows how frequently 'ornithischian' appeared in printed materials over time. For example, the word 'ornithischian' occurred 6 times in books in 1901 and 430 times in 2008. From 1901 to 2008, the word 'ornithischian' was used a total of 13,158 times in books scanned by Google. See Reference: Google Ngram project.

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