divulgation vs mouthing

divulgation

noun
  • The act of divulging or publishing; publication. 

  • The disclosure or revelation of a secret. 

  • The communication of technology or science to the general public, public awareness of science. 

mouthing

noun
  • Ranting; passionate speech devoid of meaning. 

  • The act of forming a shape with the mouth, especially as part of sign language. 

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