contend vs debate

contend

verb
  • To be in debate; to engage in discussion; to dispute; to argue. 

  • To be in opposition; to contest; to dispute; to vie; to quarrel; to fight. 

  • To believe (something is reasonable) and argue (for it); to advocate. 

  • To struggle or exert oneself to obtain or retain possession of, or to defend. 

  • contend with: To try to cope with a difficulty or problem. 

debate

verb
  • To participate in a debate; to dispute, argue, especially in a public arena. 

  • To consider (to oneself), to think over, to attempt to decide 

noun
  • An informal and spirited but generally civil discussion of opposing views. 

  • A type of literary composition, taking the form of a discussion or disputation, commonly found in the vernacular medieval poetry of many European countries, as well as in medieval Latin. 

  • Discussion of opposing views. 

  • An argument, or discussion, usually in an ordered or formal setting, often with more than two people, generally ending with a vote or other decision. 

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