abs vs six-pack

abs

noun
  • The abdominal muscles. plural of ab 

six-pack

noun
  • A highly developed set of abdominal muscles. 

  • A selection of six photographs, including one of a suspect, used for identification by a witness. 

  • A collection of six of something bundled together, especially six cans. 

How often have the words abs and six-pack occurred in a corpus of books? (source: Google Ngram Viewer )