magic bullet vs silver bullet

magic bullet

noun
  • A simple remedy for a difficult or complex problem, especially a cure for a disease. 

silver bullet

noun
  • Any straightforward solution perceived to have great effectiveness or bring miraculous results. 

  • A thermometer, especially one used for rectal temperature readings. 

  • A cocktail somewhat like a martini. 

  • A bullet made of silver, usually with reference to the folkloric belief that such bullets are the only weapons which can kill a werewolf, vampire, or other monster. 

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