tartar vs virago

tartar

noun
  • A red compound deposited during wine making; mostly potassium hydrogen tartrate — a source of cream of tartar. 

  • A hard yellow deposit on the teeth, formed from dental plaque. 

virago

noun
  • A woman given to undue belligerence or ill manner at the slightest provocation. 

  • A woman who is rough, loud, and aggressive. 

  • A woman who is scolding, domineering, or highly opinionated. 

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