heron vs stork

heron

noun
  • A long-legged, long-necked wading bird of the family Ardeidae. 

stork

noun
  • A large wading bird with long legs and a long beak of the family Ciconiidae. 

  • The seventeenth Lenormand card. 

  • The mythical bringer of babies to families, or good news. 

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