kelpie vs manes

kelpie

noun
  • A malevolent shapeshifting spirit, most often in the form of a horse, believed to haunt the rivers and lochs of Scotland. 

  • An Australian breed of sheepdog. 

manes

noun
  • The souls or spirits of dead ancestors, conceived as deities or the subjects of reverence, or of other deceased relatives. 

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