dead-end vs disconcert

dead-end

verb
  • To come to a dead-end. 

noun
  • A road with no exit. 

  • A position that offers no hope of progress. 

adj
  • Going nowhere; blocked. 

disconcert

verb
  • To frustrate, discomfit. 

  • To bring into confusion. 

  • To upset the composure of. 

noun
  • A state of disunion. 

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