mutasarrif vs prefecture

mutasarrif

noun
  • The governor of a province in some Muslim contexts, particularly (historical) in the Ottoman Empire. 

prefecture

noun
  • The office or position of a prefect. 

  • The jurisdiction of a prefect; the region administered by a prefect, especially as a translation of certain French, Chinese, and Japanese administrative divisions. 

How often have the words mutasarrif and prefecture occurred in a corpus of books? (source: Google Ngram Viewer )