further vs promote

further

verb
  • To encourage growth; to support progress or growth of something; to promote. 

  • To help forward; to assist. 

adj
  • More distant; relatively distant. 

  • More, additional. 

adv
  • To a greater extent or degree. 

  • Beyond what is already stated or is already the case. 

  • Also; in addition; furthermore; moreover. 

  • Following on (from). 

  • To, at or over a greater distance in space, time or other extent. 

promote

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

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

  • To elevate to a higher league. 

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

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