goblin vs sylph

goblin

noun
  • One of various hostile supernatural creatures, now especially (fantasy literature) a malevolent and grotesque diminutive humanoid, often associated with orcs or trolls. 

sylph

noun
  • An invisible being of the air. 

  • The elemental being of air, usually female. 

  • A slender woman or girl, usually graceful and sometimes with the implication of sublime station over everyday people. 

  • Any of the mainly dark green and blue hummingbirds (genus Aglaiocercus), the male of which has a long forked tail. 

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