beetling vs hilly

beetling

noun
  • The process by which fabrics, etc. are beetled, or beaten with a mallet. 

adj
  • Jutting or protruding, especially of a person's brows. 

hilly

adj
  • Abundant in hills; having many hills. 

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