Usage History of 'trolley'

The following chart shows how frequently 'trolley' appeared in printed materials over time. For example, the word 'trolley' occurred 4 times in books in 1752 and 66,113 times in 2008. From 1752 to 2008, the word 'trolley' was used a total of 1,515,741 times in books scanned by Google. See Reference: Google Ngram project.

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