questioning vs speculative

questioning

adj
  • Characterized by questions, inquisitiveness, doubt, or wonder. 

  • Unsure of one's sexual orientation and/or gender identity. 

noun
  • Interrogation. 

  • The action of asking questions; a survey; an inquiry. 

  • The act of challenging, wondering, and doubting. 

speculative

adj
  • Characterized by speculation; based on guessing, unfounded opinions, or extrapolation. 

  • Pursued as a gamble, with possible large profits or losses; risky. 

  • Pertaining to financial speculation; Involving or resulting from high-risk investments or trade. 

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