Usage History of 'extinct'

The following chart shows how frequently 'extinct' appeared in printed materials over time. For example, the word 'extinct' occurred 4 times in books in 1563 and 179,978 times in 2008. From 1563 to 2008, the word 'extinct' was used a total of 4,484,315 times in books scanned by Google. See Reference: Google Ngram project.

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