chance vs occasion

chance

noun
  • An opportunity or possibility. 

  • probability; possibility. 

  • The probability of something happening. 

  • Random occurrence; luck. 

verb
  • To try or risk. 

  • To discover something by chance. 

  • To rob, cheat or swindle someone. 

adj
  • Happening by chance, casual. 

occasion

noun
  • A favorable opportunity; a convenient or timely chance. 

  • Need; requirement, necessity. 

  • The time when something happens. 

  • Something which causes something else; a cause. 

  • A reason or excuse; a motive; a persuasion. 

  • A special event or function. 

  • A particular happening; an instance or time when something occurred. 

  • An occurrence or state of affairs which causes some event or reaction; a motive or reason. 

verb
  • To cause; to produce; to induce 

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