chela vs hanger-on

chela

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

  • A pupil or disciple, especially in Hinduism. 

hanger-on

noun
  • An onsetter. 

  • Someone who hangs on, or sticks to, a person, place, or service. 

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