Usage History of 'argillaceous'

The following chart shows how frequently 'argillaceous' appeared in printed materials over time. For example, the word 'argillaceous' occurred 4 times in books in 1713 and 8,724 times in 2008. From 1713 to 2008, the word 'argillaceous' was used a total of 484,486 times in books scanned by Google. See Reference: Google Ngram project.

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