paper punch vs perforator

paper punch

noun
  • synonym of hole punch 

perforator

noun
  • A perforating artery or vein 

  • A machine that can bore a tunnel underground 

  • A tool or machine that makes holes, or perforates, materials such as paper and card. 

How often have the words paper punch and perforator occurred in a corpus of books? (source: Google Ngram Viewer )