Usage History of 'underpinned'

The following chart shows how frequently 'underpinned' appeared in printed materials over time. For example, the word 'underpinned' occurred 4 times in books in 1643 and 35,980 times in 2008. From 1643 to 2008, the word 'underpinned' was used a total of 494,593 times in books scanned by Google. See Reference: Google Ngram project.

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