go missing vs push off

go missing

verb
  • To disappear without explanation; to become lost. 

push off

verb
  • To go away; to get lost. 

  • To delay, postpone, put off, push back. 

  • to commit a foul by pushing against an opponent to both accelerate more quickly and push the opponent in the opposite direction. 

How often have the words go missing and push off occurred in a corpus of books? (source: Google Ngram Viewer )