burgher vs oppidan

burgher

noun
  • A member of the medieval mercantile class. 

  • A citizen of a medieval city. 

  • A prosperous member of the community; a middle class citizen (may connote complacency). 

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 burgher and oppidan occurred in a corpus of books? (source: Google Ngram Viewer )