cockroach vs lindworm

cockroach

noun
  • A black or brown straight-winged insect of the order Blattodea. 

  • A Tutsi. 

  • A person from New South Wales. 

  • A person or a member of a group of people regarded as undesirable and rapidly procreating. 

lindworm

noun
  • A draconic creature, similar to a wyvern. 

  • A wingless serpentine dragon having two arms. 

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