chela vs janissary

chela

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

  • A pupil or disciple, especially in Hinduism. 

janissary

noun
  • An infantry soldier, often of Christian descent and forcibly converted to Islam, in a former elite Turkish (Ottoman) guard (disbanded in 1826); (by extension) any Turkish soldier, particularly one escorting a traveller. 

  • An elite, highly loyal supporter. 

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