querulant vs stirrer

querulant

noun
  • One who has obsessive feelings of having been wronged. 

stirrer

noun
  • A person who spreads rumours or causes agitation. 

  • One who stirs or moves about, as after sleep. 

  • A device used to stir. 

  • A person who stirs something. 

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