Administrator vs sultana

Administrator

noun
  • The queen's representative in some Commonwealth territories, comparable to a Governor General. 

sultana

noun
  • A female ruler of a sultanate. 

  • An old form of necklace. 

  • A pale yellow raisin made from a seedless grape. 

  • A type of viol, a cither viol. 

  • A wife or mistress of a sultan. 

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