pair of tongs vs pliers

pair of tongs

noun
  • A tool used for picking things up without touching them with the hands or fingers, consisting of two slats or grips hinged at the end or in the middle, and sometimes including a spring to open the grips. 

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 pair of tongs and pliers occurred in a corpus of books? (source: Google Ngram Viewer )