however vs though

however

adv
  • Nevertheless; yet, still; in spite of that. 

  • How ever: an emphatic form of how, used to ask in what manner. 

  • In contrast. 

  • To whatever degree or extent. 

  • In any way that one likes or chooses; in a haphazard or spontaneous way. 

conj
  • In any way in which. 

  • Regardless of the way in which. 

  • But, yet, though, although. 

though

adv
  • Despite that; however. 

  • Used to intensify statements or questions; indeed. 

conj
  • Despite the fact that; although. 

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