Captain vs conn

Captain

noun
  • The title for someone who holds the captain job on a ship or other vessel. 

  • An army officer title in most countries 

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). 

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