demulcent vs mitigatory

demulcent

adj
  • Soothing or softening. 

noun
  • A soothing medication used to relieve pain in inflamed tissues. 

mitigatory

adj
  • reducing, lessening the effects of something, generally something painful or uncomfortable 

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