lost soul vs weakling

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. 

weakling

noun
  • A person of weak character, lacking in courage and/or moral strength. 

  • A person of weak or even sickly physical constitution 

adj
  • weak, either physically, morally or mentally 

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