indicate vs reveal

indicate

verb
  • To point out; to discover; to direct to a knowledge of; to show; to make known. 

  • To show or manifest by symptoms; to point to as the proper remedies. 

  • To signal in a vehicle the desire to turn right or left. 

  • To investigate the condition or power of, as of steam engine, by means of an indicator. 

reveal

verb
  • To uncover; to show and display that which was hidden. 

  • To communicate that which could not be known or discovered without divine or supernatural instruction. 

noun
  • The outer side of a window or door frame. 

  • A revelation; an uncovering of what was hidden in the scene or story. 

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