grouch vs stomachache

grouch

noun
  • One who is grumpy or irritable. 

  • A complaint, a grumble, a fit of ill-humor. 

verb
  • To be grumpy or irritable; to complain. 

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 grouch and stomachache occurred in a corpus of books? (source: Google Ngram Viewer )