martinet vs tartar

martinet

noun
  • Anyone who lays stress on a rigid adherence to the details of discipline, or to forms and fixed methods or rules. 

  • A martin; a swift. 

  • A strict disciplinarian. 

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. 

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