forceps vs pliers

forceps

noun
  • An instrument used in surgery or medical procedures for grasping and holding objects, similar to tongs or pincers. 

pliers

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

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