Usage History of 'mainframes'

The following chart shows how frequently 'mainframes' appeared in printed materials over time. For example, the word 'mainframes' occurred 2 times in books in 1852 and 6,312 times in 2008. From 1852 to 2008, the word 'mainframes' was used a total of 291,192 times in books scanned by Google. See Reference: Google Ngram project.

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