abdominal muscle vs stomach

abdominal muscle

noun
  • Any of a group of four muscles that form the abdominal wall. 

stomach

noun
  • The belly. 

  • Desire, appetite (for something abstract). 

  • The part of a garment that covers a person's stomach. 

  • An organ in animals that stores food in the process of digestion. 

verb
  • To tolerate (something), emotionally, physically, or mentally; to stand or handle something. 

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