lost soul vs worthless person

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. 

worthless person

noun
  • a person of no worth or value; a contemptibly insignificant person 

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