oppidan vs residentiary

oppidan

adj
  • Of or pertaining to a town or conurbation. 

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

residentiary

adj
  • Of, pertaining to, or having residence, especially official residence. 

noun
  • A canon who has an official residence. 

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