airhead vs dilly

airhead

noun
  • A foolish, silly, or unintelligent person. 

  • A (usually temporary) landing area for aircraft for supplying a non-military operation. 

  • An area of hostile territory that has been seized for use as an airbase to ensure the further safe landing of troops and materiel. 

dilly

noun
  • Someone or something that is remarkable or unusual. 

  • A dilly bag. 

adj
  • Silly; characteristic of a dill. 

  • Redolent of dill (the herb). 

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