different between duddery vs doddery

English

duddery (plural dudderies)

dodder +? -y

doddery (comparative more doddery, superlative most doddery)

Doddering, trembly, shaky.
- 1994, Laurie R King, The Beekeeper's Apprentice
  That is not to say that he became a doddery old man — far from it. He was just a bit thoughtful at times, and I would catch him looking at me pensively...
- 1999, Terence Rattigan, Benoît Delhomme, David Mamet, The Winslow Boy
  The old boy's so doddery now he can hardly finish the course at all. I timed him today. It took him seventy-five seconds...

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