argumentive vs debatable

argumentive

adj
  • Being or presenting an argument or line of reasoning. 

debatable

adj
  • Able to be debated; up for discussion. 

  • Open to debate; not fully proved or confirmed. 

noun
  • A topic that is open to debate. 

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