therewith vs though

therewith

adv
  • In addition to that; besides, moreover. 

  • With this, that or those. 

  • Thereupon, forthwith; with that being said or done. 

though

adv
  • Despite that; however. 

  • Used to intensify statements or questions; indeed. 

conj
  • Despite the fact that; although. 

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