first officer vs premier

first officer

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

  • 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 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. 

premier

noun
  • The first lieutenant or other second-in-command officer of a ship. 

  • The champion team of a particular season (especially as used in Australian rules football). 

  • The government leader in a legislative congress or leader of a government-level administrative body; the head of government. 

  • The leader of a state or provincial government and cabinet. 

  • The prime minister. 

verb
  • To perform, display or exhibit for the first time. 

  • To govern in the role of premier. 

adj
  • Most ancient. 

  • Foremost; first or highest in quality or degree. 

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