assist vs promote

assist

verb
  • To make a pass that leads directly towards scoring. 

  • To help. 

  • To help compensate for what is missing with the help of a medical technique or therapy. 

noun
  • A decisive pass made to the goal scorer 

  • A helpful action or an act of giving. 

  • A defensive play, allowing a teammate to record a putout. 

promote

verb
  • To elevate to a higher league. 

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

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

  • 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 assist and promote occurred in a corpus of books? (source: Google Ngram Viewer )