questioning vs suspicious

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. 

suspicious

adj

  • Distrustful or tending to suspect. 

  • Arousing suspicion. 

  • Expressing suspicion 

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