barbed wire vs chicken wire

barbed wire

noun
  • Twisted strands of steel wire, often coated with zinc, having barbs evenly spaced along them; used to construct agricultural and military fences. 

chicken wire

noun
  • A mesh of wire, usually galvanized, with a hexagonal pattern, generally used for making fences, especially for enclosures for small farm animals and pets. 

  • A type of such material, differentiated by material, coating, wire thickness, width, and mesh size. 

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