curious vs enquiring

curious

adj
  • Tending to ask questions, or to want to explore or investigate; inquisitive; (with a negative connotation) nosy, prying. 

  • Containing or pertaining to trivalent curium. 

  • Leading one to ask questions about; somewhat odd, out of the ordinary, or unusual. 

  • Caused by curiosity. 

enquiring

adj
  • Curious, inquisitive or investigative. 

noun
  • An instance of making an enquiry; an asking. 

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