Respawn (General Help)
Quests, areas, and NPCs reset at regular intervals. An adventurer
might typically expect this to take about 45 minutes from when the NPC
was killed, item taken, or quest area otherwise modified, though various
other factors may cause this reset to be shorter or longer.
Some locations may not reset at all if a player remains in the area.
What constitutes remaining in an area varies depending on the area.
Note that some areas may not reset all at once; it is possible for parts
of an area to reset while other parts do not. Once-per-boot (unique)
quests will not reset once they have been completed for that uptime.
If you are looking for information as a ghost on how to respawn
after dying, consider reading "help death".