survivor vs tough cookie

survivor

noun
  • A person who is able to endure hardship. 

  • One who knew a specific decedent. 

  • One who survives, especially one who survives a traumatic experience. 

tough cookie

noun
  • A person who can endure physical or mental hardship; a hardened, strong-willed person. 

  • A hardy, resilient animal or plant. 

  • Something troublesome or difficult to handle. 

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