chuckle vs posset

chuckle

verb
  • To communicate through chuckling. 

  • To laugh quietly or inwardly. 

noun
  • A quiet laugh. 

posset

verb
  • To treat with possets; to pamper. 

  • To vomit up curdled milk. 

noun
  • A beverage composed of hot milk curdled by some strong infusion, such as wine. 

  • A baby's vomit, comprising curdled milk. 

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