anodyne vs ataraxic

anodyne

adj
  • Soothing or relaxing. 

  • Noncontentious, blandly agreeable, unlikely to cause offence or debate. 

  • Capable of soothing or eliminating pain. 

noun
  • A source of relaxation or comfort. 

  • Any medicine or other agent that relieves pain. 

ataraxic

adj
  • ataractic; tranquilizing 

  • Of or pertaining to ataraxia or ataraxy 

noun
  • An ataractic or tranquilizing agent. 

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