go into vs sleep on

go into

verb
  • Used other than figuratively or idiomatically: see go, into. 

  • To divide, to be a factor of. 

  • To attack; to assault physically. 

  • To get involved in; to investigate or explore. 

sleep on

verb
  • Used other than figuratively or idiomatically: see sleep, on. 

  • To postpone (a decision) at least overnight, to avoid making a hasty choice. 

  • To miss or ignore, usually used when attesting to the quality of something. 

How often have the words go into and sleep on occurred in a corpus of books? (source: Google Ngram Viewer )