indweller vs oppidan

indweller

noun
  • One who dwells in a place; an inhabitant. 

oppidan

noun
  • A class of student in traditional English public schools such as Eton; opposed to colleger or King's Scholar. 

adj
  • Of or pertaining to a town or conurbation. 

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