bolt cutter vs throatless shear

bolt cutter

noun
  • A metal tool, resembling a large pair of pliers, used to cut or sheer bolts. 

throatless shear

noun
  • A cutting tool used to make complex straight and curved cuts in sheet metal. 

How often have the words bolt cutter and throatless shear occurred in a corpus of books? (source: Google Ngram Viewer )