As in her writing room confusion is ten times confounded, so in her mind are crowded ideas piled in such a chaos that when she wants to express them the tail peeps out before the head. "Bardo" has nothing to do with the duration of time in the case you are referring to. "Bardo" is the period between death and rebirth — and may last from a few years to a kalpa. It is divided into three sub-periods (1) when the Ego delivered of its mortal coil enters into Kama-Loka (*) (the abode of Elementaries); (2) when it enters into its "Gestation State"; (3) when it is reborn in the Rupa-Loka of Deva-Chan. Sub-period (1) may last from a few minutes to a number of years — the phrase "a few years" becoming puzzling and utterly worthless without a more complete explanation; Sub-period (2) is "very long"; as you say, longer sometimes than you may even imagine, yet proportionate to the Ego's spiritual stamina; Sub-period (3) lasts in proportion to the good KARMA, after which the monad is again reincarnated. The Agama Sutra saying: — "in all these Rupa-Lokas, the Devas (Spirits) are equally subjected to birth, decay, old age, and death," means only that an Ego is borne thither then begins fading out and finally "dies," i.e., falls into that unconscious condition which precedes rebirth; and ends the Sloka with these words — "As the devas emerge from these heavens, they enter the lower world again:" i.e, they leave a world of bliss to be reborn in a world of causes.
(*) Tibetan: Yuh-Kai.