defend vs sue

defend

verb
  • To make legal defence of; to represent (the accused). 

  • To focus one's energies and talents on preventing opponents from scoring, as opposed to focusing on scoring. 

  • To attempt to retain a title, or attempt to reach the same stage in a competition as one did in the previous edition of that competition. 

  • To call a raise from the big blind. 

  • To support by words or writing; to vindicate, talk in favour of. 

  • To ward off attacks against; to fight to protect; to guard. 

sue

verb
  • To file a legal action against someone, generally a non-criminal action. 

  • To clean (the beak, etc.). 

  • To leave high and dry on shore. 

  • To seek by request; to make application; to petition; to entreat; to plead. 

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