effluence vs emission

effluence

noun
  • Something that flows out; the issue. 

  • The process of flowing out. 

emission

noun
  • Something which is emitted or sent out; issue. 

  • The act of emitting; the act of sending forth or putting into circulation. 

  • A show; a program. 

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