Usage History of 'collimations'

The following chart shows how frequently 'collimations' appeared in printed materials over time. For example, the word 'collimations' occurred 6 times in books in 1879 and 110 times in 2008. From 1879 to 2008, the word 'collimations' was used a total of 1,438 times in books scanned by Google. See Reference: Google Ngram project.

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