razor wire vs wire netting

razor wire

noun
  • A form of securing wire similar to barbed wire, but with a series of short blades instead of barbs. Also, a length thereof. 

wire netting

noun
  • A hexagonal network of interwoven wire used in fencing; chicken wire. 

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