promotion vs voiding

promotion

noun
  • An event intended to increase the reach or image of a product or brand. 

  • Transformation of a pawn into a piece (by reaching the opponent's back rank). 

  • Dissemination of information in order to increase its popularity. 

  • Forward motion. (Contrast remotion.) 

  • An advancement in rank or position. 

voiding

noun
  • That which is voided; that which is ejected or evacuated; a remnant; a fragment. 

  • An act by which something is voided, such as urination. 

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