Decamillennium

A Millennium consists of one thousand years. / A Decamillennium is ten thousand years. / […] / A Centimillennium embraces a period of one hundred thousand years.

Source: wiktionary

There is most assuredly an occult “chronological system in Hebrew Scripture”—the Kabala being its warrant; there is in it “a system of weeks”—which is based on the archaic Indian system, which may still be found in the old Jyotisha.* And there are in it cycles of “the week of days,” of the “week of months,” of years, of centuries, and even of millenniums, decamillenniums, and more, or “the week of years of years.”†

Source: wiktionary

That this bare room, in spite of its barrenness, was a Catholic church, was attested by the high altar which had preserved its form unchanged through the decamillennia and was crowned by a tall, gold, gleaming monstrance.

Source: wiktionary

These suns are selected by the Creator Sun and are commissioned by Gabriel as the most high of the constellations for service during one decamillennium, which is 10,000 of our standard years. / In their time it is 10,000 years precisely. But because we are placed farther out of the infinite light, and our vibrations are much slower here, there is a time-drag factor of about 5. […] And each of the most high rulers, in accordance with the present policy, has a period of service on the headquarters of a constellation for 3 decamillenniums, which in our time is 150,000 years.

Source: wiktionary