dippy vs mentally ill

dippy

adj
  • Having romantic feelings for; excited or enthusiastic about. 

  • Involving or suited to dipping. 

  • Lacking common sense. 

  • Of an egg: cooked so that the yolk remains runny and can be used for dipping. 

mentally ill

adj
  • Having a psychological disorder. 

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