muse vs speculative fiction

muse

noun
  • An act of musing; a period of thoughtfulness. 

  • A source of inspiration. 

  • A gap or hole in a hedge, fence, etc. through which a wild animal is accustomed to pass; a muset. 

verb
  • To wonder at. 

  • To say (something) with due consideration or thought. 

  • To become lost in thought, to ponder. 

  • To think on; to meditate on. 

speculative fiction

noun
  • A particular work belonging to this class. 

  • A class of fiction involving fantastic, supernatural or futuristic elements, including fantasy, horror, and science fiction, dealing with worlds, themes, and characters not part of everyday life. 

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