concluding vs decisive

concluding

adj
  • Finishing; closing; final. 

noun
  • A conclusion. 

decisive

adj
  • Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive. 

  • Marked by promptness and decision. 

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