betony vs woundwort

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). 

woundwort

noun
  • Any of several plants of the genus Stachys 

  • Achillea millefolium (soldier's woundwort) 

  • Solidago virgaurea (European golden-rod) 

  • Anthyllis vulneraria (kidney-vetch) 

  • Bellis perennis (English daisy) 

  • Prunella vulgaris (common self-heal) 

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