bullwhipping vs hammering

bullwhipping

noun
  • A beating with a bullwhip. 

hammering

noun
  • A period of being beaten or hammered. 

  • A heavy defeat. 

  • A dented appearance on silverware, produced by successive blows of a hammer. 

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