hasp vs milling cutter

hasp

noun
  • An instrument for cutting the surface of grassland; a scarifier. 

  • A clasp, especially a metal strap fastened by a padlock or a pin; also, a hook for fastening a door. 

  • A spindle to wind yarn, thread, or silk on. 

verb
  • To shut or fasten with a hasp. 

milling cutter

noun
  • A rotary cutting tool typically used in milling machines. 

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