backstory vs portrait

backstory

noun
  • The previous life and experiences of a person, especially a character in a dramatic work, but also a real-life person. 

  • A fictitious account of a person's history designed to conceal their actual history and motives. 

  • A prequel. 

portrait

noun
  • An accurate depiction of a person, a mood, etc. 

  • A print orientation where the vertical sides are longer than the horizontal sides. 

  • A painting or other picture of a person, especially the head and shoulders. 

adj
  • Representing the actual features of an individual; not ideal. 

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