propel vs repress

propel

verb
  • To provide an impetus for non-physical change, to make to arrive to a certain situation or result. 

  • To provide an impetus for motion or physical action, to cause to move in a certain direction; to drive forward. 

repress

verb
  • To forcefully prevent an upheaval from developing further. 

  • To check; to keep back. 

  • To press again. 

noun
  • A record pressed again; a repressing. 

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