nix vs say no

nix

verb
  • To make something become nothing; to reject or cancel. 

  • To destroy or eradicate. 

noun
  • Nothing. 

  • A treacherous water-spirit; a nixie. 

intj
  • No! Not at all! 

say no

verb
  • To reject something. 

  • To disagree; to think something or someone is doing or saying what is wrong. 

How often have the words nix and say no occurred in a corpus of books? (source: Google Ngram Viewer )