body piercing vs nose ring

body piercing

noun
  • The practice of making an opening in part of the flesh and attaching rings, small barbells or varios other decoration through it. 

  • An opening made in the flesh through the above practice. 

nose ring

noun
  • A ring worn on a person's nose, as jewellery. 

  • A ring affixed to the snout of cattle, to make them follow immediately when a chain is attached to the ring. 

How often have the words body piercing and nose ring occurred in a corpus of books? (source: Google Ngram Viewer )