Usage History of 'effectivity'

The following chart shows how frequently 'effectivity' appeared in printed materials over time. For example, the word 'effectivity' occurred 4 times in books in 1798 and 4,553 times in 2008. From 1798 to 2008, the word 'effectivity' was used a total of 156,854 times in books scanned by Google. See Reference: Google Ngram project.

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