onfall vs seizure

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. 

seizure

noun
  • The act of taking possession, as by force or right of law. 

  • A sudden attack or convulsion, (e.g. an epileptic seizure). 

  • That which is seized, or taken possession of; a thing laid hold of, or possessed. 

  • A sudden onset of pain or emotion. 

verb
  • To undergo an epileptic seizure. 

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