efflux vs outgush

efflux

verb
  • To run out; to flow forth. 

noun
  • The process of flowing out. 

  • That which has flowed out. 

outgush

verb
  • To gush or flow outward. 

noun
  • A pouring out; an outburst. 

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