promote vs suppress

promote

verb
  • To encourage, urge or incite. 

  • 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 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. 

suppress

verb
  • To restrain or repress, such as laughter or an expression. 

  • To forbid the use of evidence at trial because it is improper or was improperly obtained. 

  • To put an end to, especially with force, to crush, do away with; to prohibit, subdue. 

  • To prevent publication. 

  • To stop or prevent the enemy from executing unwanted activities like firing, regrouping, observation or others. 

  • To exclude undesirable thoughts from one's mind. 

  • To stop a flow or stream. 

  • To reduce unwanted frequencies in a signal. 

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