silver bullet vs woundwort

silver bullet

noun
  • 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. 

  • 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. 

woundwort

noun
  • Achillea millefolium (soldier's woundwort) 

  • Any of several plants of the genus Stachys 

  • Solidago virgaurea (European golden-rod) 

  • Anthyllis vulneraria (kidney-vetch) 

  • Bellis perennis (English daisy) 

  • Prunella vulgaris (common self-heal) 

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