Sanguinaria canadensis vs tetterwort

Sanguinaria canadensis

tetterwort

noun
  • A plant used as a remedy for tetter, Chelidonium majus 

  • Sanguinaria canadensis, the bloodroot. 

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