promote vs relegate

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. 

relegate

verb
  • Transfer (a sports team) to a lower-ranking league division. 

  • Assign (a thing) to an appropriate place or situation based on appraisal or classification. 

  • Exile or banish to a particular place. 

  • Remove or send to a place far away. 

  • Submit (something) to someone else for appropriate action thereby; compare delegate. 

  • Consign (a person or thing) to a place, position, or role of obscurity, insignificance, oblivion, lower rank or (especially) inferiority. 

  • Refer (a point of contention) to an authority in deference to the judgment thereof. 

  • Banish from proximity to Rome for a set time; compare relegate. 

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