jog someone's memory vs nudge

jog someone's memory

verb
  • To cause someone to remember; to spark memory. 

nudge

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

  • To near or come close to something. 

  • To move slightly. 

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. 

How often have the words jog someone's memory and nudge occurred in a corpus of books? (source: Google Ngram Viewer )