deliberative vs level headed

deliberative

noun
  • A kind of rhetoric employed in proving a thing and convincing others of its truth, in order to persuade them to adopt it. 

  • A discourse in which a question is discussed, or weighed and examined. 

adj
  • That deliberates, considers carefully. 

level headed

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