amoral vs non-moral

amoral

adj
  • Not believing in or caring for morality and immorality. 

  • Neither moral nor immoral. 

non-moral

adj
  • Not moral; unconnected with morals; having no relation to ethics or morals; not involving ethical or moral considerations. 

How often have the words amoral and non-moral occurred in a corpus of books? (source: Google Ngram Viewer )