leg up vs vulnerary

leg up

noun
  • Assistance, help given to get started or overcome a problem or obstacle. 

  • A boost, a sudden improvement; an advantage, an edge. 

  • The act of assisting another's progress over a wall or other obstacle by forming a step for one of their feet with one's hands. 

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 leg up and vulnerary occurred in a corpus of books? (source: Google Ngram Viewer )