consummation vs onset

consummation

noun
  • The act of consummating, or the state of being consummated; the state of being completed; completion. 

  • The date at which the mortgagor becomes contractually obligated to the mortgagee in a real estate transaction. 

  • The first act of sexual intercourse in a relationship, particularly the first such act following marriage. 

  • Termination; the end (as of the world or of life); an end or resulting state. 

  • The achievement of perfection. 

onset

noun
  • A setting about; a beginning. 

  • The initial portion of a syllable, preceding the syllable nucleus. 

  • The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak. 

  • The initial phase of a disease or condition, in which symptoms first become apparent. 

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