ab vs abdominal

ab

noun
  • abdominal muscle. 

  • An abscess caused by injecting an illegal drug, usually heroin. 

  • The early stages of; the beginning process; the start. 

verb
  • To abseil. 

abdominal

noun
  • An abdominal muscle. 

adj
  • Having the ventral fins under the abdomen and behind the pectoral fins. 

  • Ventral, in describing a fin. 

  • Of or pertaining to the abdomen; ventral. 

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