reprove vs sit on

reprove

verb
  • to deny or reject (a feeling, behaviour, action etc.). 

  • to criticise, rebuke or reprimand (someone), usually in a gentle and kind tone. 

  • To prove again. 

  • to express disapproval. 

sit on

verb
  • To restrain (a person). 

  • To take no action on; to hold in reserve without actually using. 

  • To hold an official inquiry regarding; to deliberate about. 

  • To block, suppress, restrain. 

  • To be a member of. 

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

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