build up vs promote

build up

verb
  • To strengthen. 

  • To accumulate, to pile up, to increase in stages. 

  • To close up by building. 

  • In solitaire card games, to place a card over another card of lower value. (e.g., place 5♦ over 4♣) 

  • To erect; to construct. 

promote

verb
  • To raise (someone) to a more important, responsible, or remunerative job or rank. 

  • To increase the activity of (a catalyst) by changing its surface structure. 

  • To elevate to a higher league. 

  • To move on to a subsequent stage of education. 

  • To encourage, urge or incite. 

  • To advocate or urge on behalf of (something or someone); to attempt to popularize or sell by means of advertising or publicity. 

  • To exchange (a pawn) for a queen or other piece when it reaches the eighth rank. 

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