Usage History of 'irradiator'

The following chart shows how frequently 'irradiator' appeared in printed materials over time. For example, the word 'irradiator' occurred 2 times in books in 1732 and 582 times in 2008. From 1732 to 2008, the word 'irradiator' was used a total of 17,779 times in books scanned by Google. See Reference: Google Ngram project.

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