allheal vs betony

allheal

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

  • Valeriana officinalis, a species in the valerian family. 

  • Prunella vulgaris, a species in the mint family. 

betony

noun
  • Any plant of the genus Stachys. 

  • Stachys officinalis (syn. Betonica officinalis, an herb used in traditional European medicine. 

  • Any plant of the genus Pedicularis (louseworts). 

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