Usage History of 'directorate'

The following chart shows how frequently 'directorate' appeared in printed materials over time. For example, the word 'directorate' occurred 4 times in books in 1688 and 75,026 times in 2008. From 1688 to 2008, the word 'directorate' was used a total of 2,115,018 times in books scanned by Google. See Reference: Google Ngram project.

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