emission vs throwing

emission

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

  • A show; a program. 

  • Something which is emitted or sent out; issue. 

throwing

noun
  • The act by which something is thrown. 

  • The process of making ceramic ware on the potter's wheel 

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