happening vs normality

happening

adj
  • Trendy, up-to-the-minute. 

  • Busy, lively; vibrant, dynamic; fashionable. 

noun
  • Something that happens. 

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

normality

noun
  • The concentration of a solution expressed in gram equivalent weights of solute per litre of solution. 

  • A measure of how well an observed distribution approximates a normal distribution. 

  • The state of being normal or usual; normalcy. 

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