Usage History of 'instillation'

The following chart shows how frequently 'instillation' appeared in printed materials over time. For example, the word 'instillation' occurred 2 times in books in 1706 and 7,620 times in 2008. From 1706 to 2008, the word 'instillation' was used a total of 325,287 times in books scanned by Google. See Reference: Google Ngram project.

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