medic vs trefoil

medic

adj
  • Of or pertaining to medicines; medical. 

noun
  • A physician. 

  • A paramedic, someone with special training in first aid, especially in the military. 

  • A medical student. 

trefoil

noun
  • Any of several plants of the pea family, having compound, trifoliate leaves; especially one of the genus Trifolium. 

  • A symbol having the shape of such leaves, especially when used as an architectural ornament. 

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