grumble vs stomachache

grumble

noun
  • The sound made by a hungry stomach. 

  • A low thundering, rumbling or growling sound. 

  • A surly complaint. 

verb
  • To utter in a grumbling fashion. 

  • To complain; to murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner. 

  • To make a low, growling or rumbling noise, like a hungry stomach or certain animals. 

stomachache

noun
  • A pain in the abdomen, often caused by indigestion. (The pain is usually lower than the stomach and related to the intestines.) 

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