myrmidon vs skivvy

myrmidon

noun
  • A soldier or a subordinate civil officer who executes orders of a superior without protest or pity (sometimes applied to bailiffs, constables, etc). 

skivvy

verb
  • To perform menial work; to do chores, like a servant. 

noun
  • A prostitute. 

  • A close-fitting, long-sleeved T-shirt with a rolled collar. 

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