chancellor vs vizier

chancellor

noun
  • A senior secretary or official with administrative or legal duties, sometimes in charge of some area of government such as finance or justice. 

  • The head of a university, sometimes purely ceremonial. 

  • The chief judge of a court of chancery (that is, one exercising equity jurisdiction). 

  • The head of the government in some German-speaking countries. 

  • A senior record keeper of a cathedral; a senior legal officer for a bishop or diocese in charge of hearing cases involving ecclesiastical law. 

  • The foreman of a jury. 

vizier

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

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

  • An ancient Mesopotamian 𒈛 (sukkal). 

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

  • vicegerent, viceroy 

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