first officer vs reeve

first officer

noun
  • 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. 

  • 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. 

reeve

noun
  • The holder of a proposed but unadopted commissioned rank of the Royal Air Force, equivalent to wing commander. 

  • The president of a township or municipal district council. 

  • Any of several local officials, with varying responsibilities. 

  • A female of the species Philomachus pugnax, a highly gregarious, medium-sized wading bird of Eurasia; the male is a ruff. 

verb
  • To pass (a rope) through a hole or opening, especially so as to fasten it. 

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