nudge vs roll out

nudge

verb
  • To near or come close to something. 

  • To move slightly. 

  • To push against gently, especially in order to gain attention or give a signal. 

noun
  • A gentle push. 

  • The use of positive reinforcement and indirect suggestions as ways to influence. 

  • A feature of instant messaging software used to get the attention of another user, as by shaking the conversation window or playing a sound. 

  • The rotation by one step of a fruit machine reel of the player's choice. 

roll out

verb
  • Used other than figuratively or idiomatically: see roll, out. 

  • To deploy or release (a new film or software, etc.); to launch (a product or service), especially in a gradual fashion across multiple regions. 

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