breastwork vs top surgery

breastwork

noun

  • Breast augmentation. 

  • A parapet. 

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

  • A railing on the quarter-deck and forecastle. 

top surgery

noun

  • Breast augmentation. 

  • Mastectomy. 

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