be sullen vs pout

be sullen

pout

verb
  • To shoot poults. 

  • To be or pretend to be ill-tempered; to sulk. 

  • To push out one's lips. 

  • To thrust itself outward; to be prominent. 

  • To say while pouting. 

noun
  • A fit of sulking or sullenness. 

  • One's facial expression when pouting. 

  • Any of various fishes such as the hornpout (Ameiurus nebulosus, the brown bullhead), the pouting (Trisopterus luscus) and the eelpouts (Zoarcidae). 

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