development vs occasion

development

noun
  • Something which has developed. 

  • The process of developing; growth, directed change. 

  • A project consisting of one or more commercial or residential buildings. 

  • The active placement of the pieces, or the process of achieving it. 

  • The expression of a function in the form of a series. 

  • The building of such a project. 

  • The application of new ideas to practical problems (cf. research). 

  • The process by in which previous material is transformed and restated. 

  • The second section of a piece of music in sonata form, in which the original theme is revisited in altered and varying form. 

  • The process by which a mature multicellular organism or part of an organism is produced by the addition of new cells. 

occasion

noun
  • Something which causes something else; a cause. 

  • Need; requirement, necessity. 

  • The time when something happens. 

  • 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. 

  • A favorable opportunity; a convenient or timely chance. 

verb
  • To cause; to produce; to induce 

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