droid vs drudge

droid

noun
  • A person having the qualities of an android; one with few or no emotions or little personality, or who acts in an unthinking manner; a robot. 

  • A robot, especially one made with some physical resemblance to a human (an android). 

drudge

noun
  • Someone who works for (and may be taken advantage of by) someone else. 

  • A person who works in a low servile job. 

verb
  • To labour in (or as in) a low servile job. 

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