dissemination vs issuance

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. 

issuance

noun
  • The act of issuing, or giving out. 

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