Middle Kingdom vs Shang

Middle Kingdom

name
  • China. 

  • Egypt from the time of its reunification under Mentuhotep II in the 11th Dynasty (ending the First Intermediate Period) to its disintegration during the 13th Dynasty and the beginning of the Second Intermediate Period. 

Shang

name
  • an ancient dynasty in China 

How often have the words Middle Kingdom and Shang occurred in a corpus of books? (source: Google Ngram Viewer )