Walter Mitty vs romanticist

Walter Mitty

noun
  • An imposter, especially one falsely claiming to have done military service. 

  • A sad or pathetic person given to flights of fancy; a daydreamer. 

romanticist

noun
  • An advocate or follower of romanticism. 

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