Usage History of 'superimposing'

The following chart shows how frequently 'superimposing' appeared in printed materials over time. For example, the word 'superimposing' occurred 2 times in books in 1777 and 6,572 times in 2008. From 1777 to 2008, the word 'superimposing' was used a total of 250,252 times in books scanned by Google. See Reference: Google Ngram project.

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