Usage History of 'substratums'

The following chart shows how frequently 'substratums' appeared in printed materials over time. For example, the word 'substratums' occurred 4 times in books in 1744 and 23 times in 2008. From 1744 to 2008, the word 'substratums' was used a total of 1,697 times in books scanned by Google. See Reference: Google Ngram project.

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