lifeless vs soul-destroying

lifeless

adj
  • uninhabited, or incapable of supporting life 

  • inanimate; having no life 

  • dull or lacking vitality 

  • dead; having lost life 

soul-destroying

adj
  • Causing erosion of moral fortitude or that eliminates hope or motivation 

How often have the words lifeless and soul-destroying occurred in a corpus of books? (source: Google Ngram Viewer )