bootleg vs mock-up

bootleg

noun
  • The part of a boot that is above the instep. 

  • A remix or mashup that is a combination of two songs but that is not authorized and audited for copyright use; primarily in the electronic music scene. 

  • An unauthorized recording, e.g., of a live concert. 

  • A play in which the quarterback fakes a handoff, conceals the ball against his hip, and rolls out. 

  • An illegally produced, transported or sold product; contraband. 

adj
  • Illegally produced, transported or sold; pirated. 

verb
  • To engage in bootlegging. 

  • To make, transport and/or sell an illegal version or copy of a copyrighted product. 

  • To make, transport and/or sell illegal alcoholic liquor. 

mock-up

noun
  • A scale or full-size model of a design or device which is not fully functional, used for teaching, demonstration, design evaluation, promotion, and other purposes. 

  • A prototype, usually low-fidelity, such as a paper illustration, screenshot, or simple configuration of a screen with limited interaction. 

How often have the words bootleg and mock-up occurred in a corpus of books? (source: Google Ngram Viewer )