anxiolytic vs paregoric

anxiolytic

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

adj
  • That reduces anxiety; tranquilizing 

paregoric

noun
  • A painkiller; a medicine which soothes or relieves pain; specifically the traditional patent medicine consisting of camphorated tincture of opium. 

adj
  • Assuaging or soothing pain. 

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