backtrack vs transfer

backtrack

verb
  • To taxi down an active runway in the opposite direction to that being used for takeoff. 

  • To retrace one's steps. 

  • To exercise a racehorse around the racetrack in the opposite direction to that in which races are run. 

  • To repeat or review work already done. 

noun
  • the act of backtracking 

transfer

verb
  • To exit one mass transit vehicle and board another (typically one belonging to a different line or mode of transportation) to continue a journey. 

  • To be or become transferred. 

  • To arrange for something to belong to or be officially controlled by somebody else. 

  • To move or pass from one place, person or thing to another. 

  • To convey the impression of (something) from one surface to another. 

noun
  • A person who transfers or is transferred from one club or team to another. 

  • The act of conveying or removing something from one place, person or thing to another. 

  • A design conveyed by contact from one surface to another; a heat transfer. 

  • An instance of conveying or removing from one place, person or thing to another; a transferal. 

  • A soldier removed from one troop, or body of troops, and placed in another. 

  • A pathological process by which a unilateral morbid condition on being abolished on one side of the body makes its appearance in the corresponding region upon the other side. 

  • An act of exiting one mass transit vehicle and boarding another (typically one belonging to a different line or mode of transportation) to continue a journey. 

  • A paper receipt given to a rider of one bus (and historically also certain elevated or subway lines), allowing free entry onto another bus to continue a journey. 

  • The conveying of genetic material from one cell to another. 

  • A conventional bid which requests partner to bid the next available suit. 

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