camouflage vs plain brown wrapper

camouflage

noun
  • A disguise or covering up. 

  • A pattern on clothing consisting of irregularly shaped patches that are either greenish/brownish, brownish/whitish, or bluish/whitish, as used by ground combat forces. 

  • The use of natural or artificial material on personnel, objects, or tactical positions with the aim of confusing, misleading, or evading the enemy. 

  • The act of disguising. 

  • Resemblance of an organism to its surroundings for avoiding detection. 

  • Clothes made from camouflage fabric, for concealment in combat or hunting. 

verb
  • To hide or disguise something by covering it up or changing the way it looks. 

plain brown wrapper

noun
  • Any veil, disguise, or mask. 

  • An act of dissimulation, camouflage; a cover-up. 

  • An obscuring cover or wrapper, originally to allow postal delivery of sexually explicit periodicals. 

  • An unmarked police car. 

How often have the words camouflage and plain brown wrapper occurred in a corpus of books? (source: Google Ngram Viewer )