confide vs whisper

confide

verb
  • To take (someone) into one's confidence, to speak in secret with. ( + in) 

  • To say (something) in confidence. 

whisper

verb
  • To speak with suspicion or timorous caution; to converse in whispers, as in secret plotting. 

  • To speak softly, or under the breath, so as to be heard only by one near at hand; to utter words without sonant breath; to talk without that vibration in the larynx which gives sonorous, or vocal, sound. 

  • To make a low, sibilant sound. 

  • To mention privately and confidentially, or in a whisper. 

noun
  • A private message to an individual in a chat room. 

  • A low rustling sound, like that of the wind in leaves. 

  • A rumor. 

  • A faint trace or hint (of something). 

  • The act of speaking in a quiet voice, especially, without vibration of the vocal cords. 

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