puzzle vs transparency

puzzle

noun
  • The state of being puzzled; perplexity. 

  • Anything that is difficult to understand or make sense of. 

  • A riddle. 

  • A game for one or more people that is more or less difficult to work out or complete. 

  • A jigsaw puzzle. 

  • A crossword puzzle. 

verb
  • To think long and carefully, in bewilderment. 

  • To perplex, confuse, or mystify; to cause (someone) to be faced with a mystery, without answers or an explanation. 

  • To make intricate; to entangle. 

transparency

noun
  • Openness; accessibility to scrutiny. 

  • Sufficient accuracy to make the compressed result perceptually indistinguishable from the uncompressed input. 

  • The quality of being transparent; transparence. 

  • A transparent artwork, viewable by shining light through it. 

  • A translucent film-like material with an image imprinted on it, viewable by shining light through it. 

  • A transparent object. 

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