dead-end vs encourage

dead-end

adj
  • Going nowhere; blocked. 

noun
  • A road with no exit. 

  • A position that offers no hope of progress. 

verb
  • To come to a dead-end. 

encourage

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

  • To spur on, strongly recommend. 

  • To foster, give help or patronage 

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