Usage History of 'railroads'

The following chart shows how frequently 'railroads' appeared in printed materials over time. For example, the word 'railroads' occurred 2 times in books in 1669 and 231,051 times in 2008. From 1669 to 2008, the word 'railroads' was used a total of 8,501,158 times in books scanned by Google. See Reference: Google Ngram project.

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