damsel vs friend girl

damsel

noun
  • A young woman who is not married. 

  • A girl; a maiden (without sexual experience). 

  • A young woman (of noble birth). 

  • A chattering damsel (component of a mill). 

  • An unmarried lady-in-waiting. 

friend girl

noun
  • a female friend. 

How often have the words damsel and friend girl occurred in a corpus of books? (source: Google Ngram Viewer )