pupil vs trainer

pupil

noun
  • One who studies under supervision of a renowned expert in their field. 

  • A learner at a school under the supervision of a teacher. 

  • The central dark part of an ocellated spot. 

  • The hole in the middle of the iris of the eye, through which light passes to be focused on the retina. 

trainer

noun
  • A person responsible for treating injuries sustained by players during matches; a physiotherapist. 

  • A person who trains another; a coach. 

  • A patch for a video game that applies cheats. 

  • A running shoe or sneaker. 

  • A piece of indoor equipment allowing a bicycle to be ridden while stationary. 

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