morbose vs unsound

morbose

adj
  • Proceeding from disease; morbid; unhealthy. 

unsound

adj
  • Infirm, diseased. 

  • Not whole, not solid, defective. 

  • Not good, unreliable. 

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