averse vs impartial

averse

adj
  • Turned away or backward. 

  • Turned so as to show the back, as of a right hand. 

  • Having a repugnance or opposition of mind. 

impartial

adj
  • treating all parties, rivals, or disputants equally; not partial; not biased 

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