get on to vs lean on

get on to

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

  • To contact (someone) in order to raise or discuss a certain matter. 

  • To progress to; to start working on. 

lean on

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

  • To put pressure on; to attempt to compel a person to do something; to exert influence on. 

  • To depend upon for support; to require assistance from. 

  • To criticize or reprimand for the purpose of changing behavior. 

How often have the words get on to and lean on occurred in a corpus of books? (source: Google Ngram Viewer )