dragonet vs lindworm

dragonet

noun
  • A small dragon. 

  • Any of the small perciform marine fish of the families Callionymidae and Draconettidae (slope dragonets) found mainly in the tropical waters of the western Indo-Pacific, the family containing approximately 186 species in 18 genera. 

lindworm

noun
  • A wingless serpentine dragon having two arms. 

  • A draconic creature, similar to a wyvern. 

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