imagery vs speculative fiction

imagery

noun
  • The work of one who makes images or visible representation of objects. 

  • Imitation work. 

  • Images in general, or en masse. 

  • Unreal show; imitation; appearance. 

  • Rhetorical decoration in writing or speaking; vivid descriptions presenting or suggesting images of sensible objects; figures in discourse. 

  • The work of the imagination or fancy; false ideas; imaginary phantasms. 

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 imagery and speculative fiction occurred in a corpus of books? (source: Google Ngram Viewer )