mistrustful vs questioning

mistrustful

adj
  • Having a suspicion, imagining or supposing (that something undesirable is the case). 

  • Expressing or showing a lack of trust. 

  • Having mistrust, lacking trust (in someone or something). 

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. 

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