encourage vs hold off

encourage

verb
  • To mentally support; to motivate, give courage, hope or spirit. 

  • To spur on, strongly recommend. 

  • To foster, give help or patronage 

hold off

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

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

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