heterologous vs underbred

heterologous

adj
  • Of, or relating to different species 

  • Having different relationships or different elements 

underbred

adj
  • Of inferior breeding or upbringing; vulgar, lacking in manners or finesse. 

  • Not purebred; of an inferior strain. 

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