pliers vs tweezers

pliers

noun
  • A pincer-like gripping tool that multiplies the strength of the user's hand, often used for bending things. 

tweezers

noun
  • A small pincerlike instrument, usually made of metal, used for handling or picking up small objects (such as postage stamps), plucking out (plucking) hairs, pulling out slivers, etc. 

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