dependant vs lackey

dependant

noun
  • A person who depends on another for support, particularly financial support (= US dependent). 

lackey

verb
  • To attend, wait upon, serve obsequiously. 

noun
  • A fawning, servile follower. 

  • A footman, a liveried male servant. 

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