birth vs onfall

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. 

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

  • To produce, give rise to. 

adj
  • A familial relationship established by childbirth. 

onfall

noun
  • A falling on or upon; an attack, onset, or assault. 

  • The fall of the evening. 

  • A fall of rain or snow. 

verb
  • To fall on or upon. 

  • To assault, attack. 

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