moreover,
u know how long Ksitigarbha has maintained the position of the
Tenth Bhumni?!
"Buddha told Manjushri, "As an
analogy, it is as if in the thousands of worlds, all the grasses,
trees, bushes, straw, hemp, bamboo, reeds, mountains, stones, dust
and every object is made into the Ganges River. And each grain of
sand in the Ganges River becomes a great world. And each speck of
dust in each world is compared to an aeon. And within those aeons
the specks of dust that would accumulate would also become aeons.
Increase this amount a thousand times and this is how long
Ksitigarbha has maintained the position of the Tenth Ground - the
highest ground or position that a Bodhisattva can reach! "

..and it had not stated the other stages, it's already so long!!

And u know how many came to the preaching?
At that time, Buddha Sakyamuni
asked Bodhisattva Manjushri, Mahasattva, "Do you know how many
Buddhas, Bodhisattvas, heavenly beings, dragons, ghosts and gods
from other lands and worlds are here in the Trayastrimsa Heaven for
this instruction?" Manjushri answered, "World-Honored One,
even using my divine power for thousands of aeons,
I still would not be able to calculate how many are here." Buddha
Sakyamuni said to Manjushri, "Even if I use my Buddha eye,
I too cannot calculate them. These multitudes include all
whom Bodhisattva Kishitigarbha has released, is releasing, and will
release from suffering. That is, these multitudes include all
living beings who live in the past, present and
future!"
wow, even Buddha eye also cannot calculate!! 
/\