though vs whereupon

though

conj
  • Despite the fact that; although. 

adv
  • Used to intensify statements or questions; indeed. 

  • Despite that; however. 

whereupon

conj
  • After which, in consequence. 

  • Upon which. 

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