chela vs pupil

chela

noun
  • A pupil or disciple, especially in Hinduism. 

  • A pincer-like claw of a crustacean or arachnid. 

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. 

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