fiction vs work of fiction

fiction

noun
  • A verbal or written account that is not based on actual events (often intended to mislead). 

  • Literary type using invented or imaginative writing, instead of real facts, usually written as prose. 

  • A legal fiction. 

work of fiction

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

  • A fictional account; a story. 

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