Forum:A Time Discrepancy in the Anime

I have noticed a discrepancy in the flow of time between Hueco Mundo and the other realms. In episode 192 when Nnoitora is fighting Nel, Nnoitora says, "Just how many years do you think have passed since you left this place?" That means that it was years ago when Nnoitora was the 8th Espada that Nel was exiled from Las Noches. And all of the current Espada, with the exception of Aaroniero, were created artificially with the Hougyoku.

But in the Human World, it was during Summer Break that Aizen took the Hougyoku from Rukia's body and retreated to Hueco Mundo. And because the Hougyoku is supposed to awaken that coming winter, less than six months would have had to have elapsed between the time that Aizen retrieved the Hougyoku and the time that Nnoitora says those words to Nel.

So, if only several MONTHS had passed since Aizen acquired the Hougyoku, how could several YEARS have passed since Nnoitora became an Espada?