rile up vs roil

rile up

verb
  • To rile; to aggravate. 

roil

verb
  • To annoy; to make angry; to throw into discord. 

  • To romp. 

  • To render turbid by stirring up the dregs or sediment of. 

  • To bubble, seethe. 

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