folk medicine vs traditional medicine

folk medicine

noun
  • A particular medicinal remedy used in such traditional medical practices. 

  • Traditional medical practices developed and used by non-physicians, typically involving customary homespun techniques and medicinal remedies derived from native plants. 

traditional medicine

noun
  • A specific medicine or remedy in this system. 

  • A system of medicine developed before the era of modern medicine, especially one that is associated with a single culture. 

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