ixnay vs upend

ixnay

verb
  • To reject something. 

intj
  • No. 

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

upend

verb
  • To destroy, invalidate, overthrow, or defeat. 

  • To tip or turn over. 

  • To end up; to set on end. 

  • To affect or upset drastically. 

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