novelette vs work of fiction

novelette

noun
  • A short novel. 

  • A short piece of lyrical music, especially one for the piano. 

work of fiction

noun
  • A fictional account; a story. 

  • A fictitious account; an account of events that never took place. 

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