Do delete/undelete votes age away? [duplicate]

Question

This doesn't seem to be specificed in the docs and the FAQ.

I see this suggested in Let's Plan the Second Iteration of the Stack Exchange Quality Project! (10.2016) and mentioned as an existing feature (!) in Un-delete count off (10.2010).

Answer 1

From How Does Deleting Work? under "How do votes to delete work?":

Votes to delete or undelete never expire.

This matches my experience; I cast a delete vote in January 2016 on a particular post, and the timeline of that post shows that no additional delete votes have been cast, and that mine has not expired.