onrush vs outstart

onrush

verb

  • To rush or flow forward forcefully. 

  • To assault aggressively. 

noun

  • An aggressive assault. 

  • A forceful rush or flow forward. 

outstart

verb

  • To start out or up. 

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