make oneself scarce vs slide off

make oneself scarce

verb
  • To leave or stay away from a place, especially in order to avoid an encounter. 

slide off

verb
  • To leave a place, a meeting, etc., without being noticed; to slip away, slip off. 

  • Used other than figuratively or idiomatically: see slide, off. 

How often have the words make oneself scarce and slide off occurred in a corpus of books? (source: Google Ngram Viewer )