firedrake vs lindworm

firedrake

noun
  • A fire-breathing dragon. 

  • A fiery meteor, an ignis fatuus, a rocket 

  • A kind of firework 

  • A worker at a furnace or fire 

lindworm

noun
  • A wingless serpentine dragon having two arms. 

  • A draconic creature, similar to a wyvern. 

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