cobwebbiness vs donkey's ears

cobwebbiness

noun
  • Oldness; datedness. 

  • The state of having many cobwebs. 

  • The quality of a resemblance to cobwebs. 

donkey's ears

noun
  • A long time, years and years. 

  • A pair of scissor binoculars. 

How often have the words cobwebbiness and donkey's ears occurred in a corpus of books? (source: Google Ngram Viewer )