tranquilizer vs vulnerary

tranquilizer

noun
  • A drug used to reduce anxiety or tension. 

  • That which tranquillizes or soothes. 

vulnerary

noun
  • A healing drug or other agent used in healing and treating wounds. 

adj
  • Useful or used for healing wounds; healing, curative. 

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