high-rise vs wall tower

high-rise

noun
  • A tall building, one consisting of many storeys. 

adj
  • Designed to sit high on, or above, the wearer's hips. 

wall tower

noun
  • A tower built into and forming part of a line of fortification or a fortified city wall. 

How often have the words high-rise and wall tower occurred in a corpus of books? (source: Google Ngram Viewer )