chela vs liegeman

chela

noun
  • A pupil or disciple, especially in Hinduism. 

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

liegeman

noun
  • A male vassal (subject of a sovereign or lord). 

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