enunciation vs listening

enunciation

noun
  • That which is enunciated or announced; words in which a proposition is expressed; formal declaration 

  • Mode of utterance or pronunciation, especially as regards fullness and distinctness or articulation. 

  • The act of enunciating, announcing, proclaiming, or making known; open attestation; declaration. 

listening

adj
  • Of an action that is performed with caution and attention to sounds. 

  • Of something that is used in order to hear or to improve the ability to hear. 

  • Of something or someone that listens. 

noun
  • Skill or ability of perceiving spoken language. 

  • Action of the verb listening 

  • An educational exercise involving listening 

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