dissemination vs mouthing

dissemination

noun
  • The act of disseminating, or the state of being disseminated; diffusion for propagation and permanence; a scattering or spreading abroad, as of ideas, beliefs, etc. 

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 dissemination and mouthing occurred in a corpus of books? (source: Google Ngram Viewer )