barbed wire vs wire rope

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. 

wire rope

noun
  • A strong cable consisting of twisted strands of wire, generally intended for supporting heavy loads. 

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