disapprove vs ixnay

disapprove

verb
  • To refuse to approve; reject. 

  • To have or express an unfavorable opinion. 

  • To condemn; to consider wrong or inappropriate; used with of. 

  • She disapproves of rap music because of its sometimes aggressive lyrics. 

ixnay

verb
  • To reject something. 

noun
  • Nothing; nix; often in the phrase "ixnay on ...", indicating something that must not be mentioned, often in Pig Latin 

intj
  • No. 

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