encourage vs shut off

encourage

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

  • To spur on, strongly recommend. 

  • To foster, give help or patronage 

shut off

verb
  • To separate; to isolate. 

  • To stop or turn off. 

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