mutasarrif vs sanjak

mutasarrif

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

sanjak

noun
  • A district, a prefecture, particularly (historical) a second-level administrative division of the Ottoman Empire. 

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