comeback vs mordancy

comeback

noun
  • A retort or answer, particularly a quick or clever one. 

  • A return (e.g. to popularity, success, etc.) after an extended period of obscurity. 

  • An occurrence of an athlete or sports team in a competition overcoming a substantial disadvantage in points to win or draw. 

mordancy

noun
  • The state or quality of being mordant. 

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