dob in vs reproach

dob in

verb
  • To betray someone by informing on them. 

reproach

verb
  • To disgrace, or bring shame upon. 

  • To criticize or rebuke (someone). 

noun
  • A mild rebuke, or an implied criticism. 

  • Disgrace or shame. 

  • An object of scorn. 

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