civvies vs mufti

civvies

noun
  • Civilian clothes. 

mufti

noun
  • A civilian dress when worn by a member of the military, or casual dress when worn by a pupil of a school who normally would wear uniform. 

  • A Muslim scholar and interpreter of shari’a law, who can deliver a fatwa. 

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