do right by vs pull strings

do right by

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

pull strings

verb
  • To manipulate a situation, especially by asking favours of others; to use one's influence with others to attain a desired goal. 

  • To control a person, organization, or situation by operating behind the scenes, as a puppeteer controls a marionette. 

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