chela vs underling

chela

noun
  • A pupil or disciple, especially in Hinduism. 

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

underling

noun
  • A subordinate, or person of lesser rank or authority. 

  • A low, wretched person. 

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