jumper cable vs tendon

jumper cable

noun
  • An electrical cable providing a connection between rail or road vehicles. 

  • A pair of insulated electrical wires with alligator clips at each end used to jump-start a car with a dead (flat) battery. 

tendon

noun
  • A wire or bar used to strengthen prestressed concrete. 

  • A tough band of flexible but inelastic fibrous collagen tissue that connects a muscle with its bony attachment and transmits the force which the muscle exerts. 

  • The hamstring of a quadruped. 

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