In the chronology of The Lord of the Rings - Appendix B - there is a strangely long period between the destruction of the One Ring and the rescue of the unconscious Frodo and Sam by Gandalf and the eagles - and Frodo and Sam awakening to participate in the celebration on the Field of Cormallen.
March 25 - The Host is surrounded on the Slag-hills of Dagorlad. Frodo and Samwise reach the Sammath Naur. Gollum seizes the Ring and falls in the Cracks of Doom. Downfall of Barad-dûr and passing of Sauron. [...]
April 6 - The Ring-bearers are honoured on the Field of Cormallen.
Apparently Frodo and Sam were asleep for about a fortnight!
The only explanation comes a few pages later when Gandalf says: 'The hands of the King are hands of healing, dear friends,' he said. 'But you went to the very brink of death ere he recalled you, putting forth all his power, and sent you into the sweet forgetfulness of sleep. And though you have indeed slept long and blessedly, still it is now time to sleep again.'
In The History of Middle Earth - Sauron Defeated; Christopher Tolkien comments that in the earliest draft the date of Frodo and Sam's awakening was the third of April, and subsequent revision put-in fourth and seventh, before settling on sixth.
But why so long? Christopher says: "I do not know precisely what considerations impelled my father so greatly to prolong the time during which Sam and Frodo lay asleep." The only clue is a marginal note saying: "More time required for [?gathering] of goods"
I have puzzled over the chronology of this period of time, and I cannot see any reason why F&S should be compelled to remain comatose for such an unfeasibly long period of time - in an era without the possibility of parenteral hydration and nutrition!