conn vs supervisor

conn

noun
  • The duty of directing a ship, usually used with the verb to have or to take and accompanied by the article "the." 

verb
  • To direct a ship; to superintend the steering of (a vessel); to watch the course of (a vessel) and direct the helmsman how to steer (especially through a channel, etc, rather than steer a compass direction). 

supervisor

noun
  • A person with the official task of overseeing the work of a person or group, or of other operations and activities. 

  • In certain states, an elected member of the governing body for a county which is called the board of supervisors. 

  • A person who monitors someone to make sure they comply with rules or other requirements set for them. 

  • A process responsible for managing other processes. 

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