duke vs vizier

duke

noun
  • A grand duke. 

  • The male ruler of a duchy (female equivalent: duchess). 

  • A fist. 

  • The sovereign of a small state. 

  • A high title of nobility; the male holder of a dukedom. 

  • Any of various nymphalid butterflies of the Asian genera Bassarona and Dophla. 

verb
  • To hit or beat with the fists. 

  • To give cash to; to give a tip to. 

vizier

noun
  • vicegerent, viceroy 

  • A fairy chess piece that can only be moved one space up, down, left or right. 

  • An ancient Mesopotamian 𒈛 (sukkal). 

  • The highest-ranking official or minister in ancient Egypt or Ebla; a chief administrator or a chancellor. 

  • A high-ranking official or minister in an Islamic government, especially in the Ottoman Empire. 

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