chancellor vs first officer

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. 

first officer

noun
  • The most senior civil servant in the United States Foreign Service, with responsibility for running an embassy under the authority of and reporting to the ambassador. 

  • Air Transport Auxiliary rank corresponding to Flight Lieutenant in the Royal Air Force. 

  • Women's Royal Naval Service rank corresponding to Lieutenant-Commander in the Royal Navy. 

  • The copilot of an aircraft. 

  • The chief mate of a merchant ship. 

  • The executive officer, second in command of a naval vessel. 

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