bloodwort vs yarrow

bloodwort

noun
  • Sanguinary, common yarrow, Achillea millefolium. 

  • Rumex sanguineus, bloody dock, wood dock, bloody-veined dock. 

  • Capsella bursa-pastoris, shepherd's purse. 

  • Any of the Haemodoraceae, a family of flowering plants some of whose roots contain a red dye. 

  • The plant bloodroot, Sanguinaria canadensis. 

  • Various species in the genus Sanguisorba, burnet. 

yarrow

noun
  • Common yarrow, Achillea millefolium, the type species of the genus. 

  • The green woodpecker, Picus viridis. 

  • Any of several pungent Eurasian and North American herbs, of the genus Achillea, used in traditional herbal medicine. 

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