airheaded vs dilly

airheaded

adj
  • silly, foolish 

  • unintelligent 

dilly

adj
  • Silly; characteristic of a dill. 

  • Redolent of dill (the herb). 

noun
  • Someone or something that is remarkable or unusual. 

  • A dilly bag. 

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