commencement vs development

commencement

noun
  • The first existence of anything; act or fact of commencing; the beginning. 

  • The day when degrees are conferred by colleges and universities upon students and others. 

  • A graduation ceremony, from a school, college or university. 

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. 

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