baby colic vs bellyache

baby colic

noun
  • A condition in which an otherwise healthy baby cries or screams frequently and for extended periods without any discernible reason. 

bellyache

noun
  • Any pain in the belly, stomach, or abdomen. 

verb
  • To unnecessarily complain or whine, often about simple matters. 

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