charade vs crossword

charade

noun
  • A single round of the game charades, an acted form of the earlier riddles. 

  • A deception or pretense, originally an absurdly obvious one but now in general use. 

verb
  • To act out a charade (of); to gesture; to pretend. 

crossword

noun
  • The grid of such a puzzle 

  • A word puzzle in which interlocking words are entered usually horizontally and vertically into a grid based on clues given for each word. 

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