earhole vs lughole

earhole

noun
  • The outer aperture of the ear; the entrance to the ear canal. 

  • A puncture in the ear, usually in the earlobe, such as for earrings. 

  • An opening in a head-covering, such as a hat or helmet, for the ears. 

lughole

noun
  • ear 

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