birth vs onset

birth

noun
  • A beginning or start; a point of origin. 

  • The process of childbearing; the beginning of life. 

  • That which is born. 

  • An instance of childbirth. 

  • The circumstances of one's background, ancestry, or upbringing. 

adj
  • A familial relationship established by childbirth. 

verb
  • To bear or give birth to (a child). 

  • To produce, give rise to. 

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 birth and onset occurred in a corpus of books? (source: Google Ngram Viewer )