Bear vs Plough

Bear

name

  • Ursa Major. 

  • A surname. 

Plough

name

  • The brightest seven stars of the constellation Ursa Major. They are Alkaid, Mizar, Alioth, Megrez, Dubhe, Merak, and Phecda. 

  • A surname. 

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