boob vs chest wall

boob

noun
  • A breast, especially that of an adult or adolescent female human. 

  • A mistake. 

  • A prison; jail. 

  • An idiot; a fool. 

verb
  • To make a mistake. 

  • To behave stupidly; to act like a boob. 

chest wall

noun
  • The set of tissues that bound the thoracic cavity, including the rib cage, fascia, muscles etc. 

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