fight back vs reply

fight back

verb
  • to counterattack; to resist an attack. 

  • to defend oneself by fighting. 

  • to repress; to struggle to repress. 

  • to overturn a losing deficit. 

reply

verb
  • To act or gesture in response. 

  • To give a written or spoken response, especially to a question, request, accusation or criticism; to answer. 

  • To repeat something back; to echo. 

noun
  • Something given in reply. 

  • A counterattack. 

  • A document written by a party specifically replying to a responsive declaration and in some cases an answer. 

  • The answer of a figure. 

  • A written or spoken response; part of a conversation. 

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