commencement vs swaddling clothes

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. 

swaddling clothes

noun
  • An early period in development, infancy, the beginnings of something; inception. 

  • A garment, made of strips of cloth, used to bind an infant and restrict movement of its limbs. 

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