breast reduction vs breastwork

breast reduction

noun
  • The operation performed to reduce the volume of breast tissue. 

breastwork

noun
  • A parapet. 

  • A fortification consisting of a breast-high bulwark; a parapet. 

  • Breast augmentation. 

  • A railing on the quarter-deck and forecastle. 

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