douse vs set afire

douse

verb
  • To put out; to extinguish. 

  • To strike or lower in haste; to slacken suddenly 

  • To plunge suddenly into water; to duck; to immerse. 

  • To strike, beat, or thrash. 

  • To fall suddenly into water. 

noun
  • A sudden plunging into water. 

  • A blow or strike, especially to the face. 

set afire

verb
  • Synonym of set on fire 

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