allheal vs brownwort

allheal

noun
  • Prunella vulgaris, a species in the mint family. 

  • Valeriana officinalis, a species in the valerian family. 

  • Stachys, a genus of plants in the mint family, heal-all, self-heal, woundwort, betony, lamb's ears, hedgenettle. 

brownwort

noun
  • A species of figwort or Scrophularia, (Scrophularia vernalis), and other species of the same genus, mostly perennials with inconspicuous coarse flowers. 

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