famulus vs skivvy

famulus

noun
  • A close attendant or assistant, especially of a magician or occult scholar. 

skivvy

noun
  • A prostitute. 

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

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

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