credulity vs questioning

credulity

noun
  • Faith, credence; acceptance or maintenance of a belief. 

  • A willingness to believe in someone or something in the absence of reasonable proof; credulousness. 

questioning

noun
  • Interrogation. 

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

  • The act of challenging, wondering, and doubting. 

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

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

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