chela vs pincers

chela

noun
  • A pincer-like claw of a crustacean or arachnid. 

  • A pupil or disciple, especially in Hinduism. 

pincers

noun
  • The front claws of crustaceans such as lobsters. 

  • A gripping tool, pivoted like a pair of scissors, but with blunt jaws. 

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