barbed wire vs fencepost

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. 

fencepost

noun
  • A post which helps hold up a fence. 

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