Usage History of 'subgraphs'

The following chart shows how frequently 'subgraphs' appeared in printed materials over time. For example, the word 'subgraphs' occurred 2 times in books in 1942 and 5,010 times in 2008. From 1942 to 2008, the word 'subgraphs' was used a total of 82,073 times in books scanned by Google. See Reference: Google Ngram project.

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