do right by vs relent

do right by

verb
  • To treat, deal with, or act toward (someone) in a morally just, socially honorable fashion. 

relent

verb
  • To give in or be swayed; to become less hard, harsh, or cruel; to show clemency. 

  • To slacken; to abate. 

noun
  • Stay; stop; delay. 

How often have the words do right by and relent occurred in a corpus of books? (source: Google Ngram Viewer )