adventure vs happening

adventure

noun
  • A remarkable occurrence; a striking event. 

  • A text adventure or an adventure game. 

  • A mercantile or speculative enterprise of hazard; a venture; a shipment by a merchant on his own account. 

  • The encountering of risks; a bold undertaking, in which dangers are likely to be encountered, and the issue is staked upon unforeseen events; a daring feat. 

  • A feeling of desire for new and exciting things. 

happening

noun
  • Something that happens. 

  • A spontaneous or improvised event, especially one that involves audience participation. 

adj
  • Trendy, up-to-the-minute. 

  • Busy, lively; vibrant, dynamic; fashionable. 

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