built like a tank vs hefty

built like a tank

adj
  • Broad-shouldered and of solid, muscular build. 

  • Sturdy; exceptionally well constructed. 

hefty

adj
  • Possessing physical strength and weight; rugged and powerful; powerfully or heavily built. 

  • Heavy, strong, vigorous, mighty, impressive. 

  • Strong; bulky. 

  • Heavy, weighing a lot. 

  • Large. 

How often have the words built like a tank and hefty occurred in a corpus of books? (source: Google Ngram Viewer )