vigour vs wald

vigour

noun
  • Strength; efficacy; potency. 

  • Strength or force in animal or vegetable nature or action. 

  • Active strength or force of body or mind; capacity for exertion, physically, intellectually, or morally; energy. 

wald

noun
  • Power; strength. 

  • Command; control; possession. 

  • Forest; woods. 

verb
  • To govern; inherit. 

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