coward vs lost soul

coward

noun
  • A person who lacks courage. 

adj
  • Cowardly. 

  • Borne in the escutcheon with his tail doubled between his legs. 

lost soul

noun
  • One who is forlorn, who lacks direction, purpose, or motivation in life. 

  • A soul that is destined to go to hell; a person possessing such a soul. 

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