listen vs make known

listen

verb
  • To pay attention to a sound or speech. 

  • To expect or wait for a sound, such as a signal. 

  • To accept advice or obey instruction; to agree or assent. 

noun
  • An instance of listening. 

make known

verb
  • To announce (some information) generally. 

  • To disclose (a secret). 

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