moorhen vs ogress

moorhen

noun
  • A female red grouse, Lagopus lagopus scotica. 

  • Any of various medium-sized water birds of the genus Gallinula, of the rail family, that feed in open water margins. 

ogress

noun
  • A female ogre. 

  • A fierce, unfriendly woman. 

  • A roundel sable. 

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