averse vs vacillant

averse

adj
  • Having a repugnance or opposition of mind. 

  • Turned away or backward. 

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

vacillant

adj
  • Vacillating; wavering; fluctuating; irresolute. 

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