plebeian vs unrefined

plebeian

adj
  • Common, particularly (derogatory) vulgar, crude, coarse, uncultured. 

  • Of or concerning the plebs, the common citizens of ancient Rome. 

  • Of or concerning the common people. 

noun
  • A commoner, particularly (derogatory) a low, vulgar person. 

  • A member of the plebs, the common citizens of ancient Rome. 

unrefined

adj
  • crude, raw or unprocessed 

  • lacking refinement; uncouth 

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