pupil vs schoolgirl

pupil

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

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

  • 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. 

schoolgirl

noun
  • A girl attending school. 

verb
  • To restrain in a schoolgirl pin. 

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