hold off vs repel

hold off

verb
  • To delay someone or something temporarily; to keep at bay. 

  • To delay commencing (an action until some specified time or event has passed). 

repel

verb
  • To save (a shot). 

  • To ward off (a malignant influence, attack etc.). 

  • To drive back (an assailant, advancing force etc.). 

  • To cause repulsion or dislike in; to disgust. 

  • To reject, put off (a request, demand etc.). 

  • To force away by means of a repulsive force. 

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