ending vs onrush

ending

noun
  • A termination or conclusion. 

  • The last part of something. 

  • The last morpheme of a word, added to some base to make an inflected form (such as -s in "dogs"). 

onrush

noun
  • An aggressive assault. 

  • A forceful rush or flow forward. 

verb
  • To assault aggressively. 

  • To rush or flow forward forcefully. 

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