push off vs slink off

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. 

slink off

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