happening vs popular

happening

adj
  • Busy, lively; vibrant, dynamic; fashionable. 

  • Trendy, up-to-the-minute. 

noun
  • Something that happens. 

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

popular

adj
  • Liked by many people; generally pleasing, widely admired. 

  • Common among the general public; generally accepted. 

  • Pertaining to or deriving from the people or general public. 

  • Adapted to the means of the common people; cheap. 

  • Concerning the people; public. 

  • Aimed at ordinary people, as opposed to specialists etc.; intended for general consumption. 

noun
  • A person who is popular, especially at a school. 

  • An inexpensive newspaper with wide circulation. 

  • A member of the Populares 

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