carnet vs rover

carnet

noun
  • An admission pass. 

  • A ticket book, a collection of tickets in the form of a booklet often sold at a discount to single tickets. 

  • A customs document that allows the temporary duty-free importation of a particular article 

rover

noun
  • A position that is one of three of a team's followers, who follow the ball around the ground. Formerly a position for short players, rovers in professional leagues are frequently over 183 cm (6'). 

  • A pirate. 

  • A randomly selected target. 

  • A vagabond, a tramp, an unsteady, restless person, one who by habit doesn't settle down or marry. 

  • A remotely-operated vehicle; ROV 

  • A defensive back position whose coverage responsibilities are a hybrid of those of a cornerback, safety and linebacker. 

  • One who roves, a wanderer, a nomad. 

  • A ball which has passed through all the hoops and would go out if it hit the stake but is continued in play; also, the player of such a ball. 

  • The tenth defensive player in slow-pitch softball. 

  • A pirate ship. 

  • A vehicle for exploring extraterrestrial bodies. 

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