eared seal vs seadog

eared seal

noun
  • A seal belonging in the Otariidae family; a fur seal or a sea lion, differing from the true seals in having small, visible ears and the ability to walk on land. 

seadog

noun
  • A dogfish. 

  • A charge resembling the talbot but with scales, webbed feet and a broad tail. 

  • A sailor accustomed to the sea. 

  • An omen of bad luck. 

  • A white-topped wave in an estuary. 

  • A pirate. 

  • A fogbow, as seen my mariners. 

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