anxiolytic vs tranquilizing

anxiolytic

adj
  • That reduces anxiety; tranquilizing 

noun
  • A drug prescribed for the treatment of symptoms of anxiety. 

tranquilizing

adj
  • Having the effect of making someone or something tranquil; calming, soothing. 

  • Of a drug: having the effect of calming a person or animal, or putting them to sleep; sedating, sedative. 

noun
  • The act of calming a person or animal, or putting them to sleep, using a drug. 

  • The act of making someone or something tranquil. 

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