[501] The two registrations of Israel in Numbers

603,550 Israel over 20 and 22,000 Levites on 1512Iyyar1, and 601,730 Israel over 20 and 23,000 Levites at the end of the 40 years, by Jericho:

These were the ones registered by Moses and Eleazar the priest when they registered the sons of Israel in the desert plains of Moab by the Jordan at Jericho.
But among these there did not prove to be a man of those registered by Moses and Aaron the priest when they registered the sons of Israel in the wilderness of Sinai.
For Jehovah had said concerning them: They will die without fail in the wilderness. So there was not left of them a man except Caleb the son of Jephunneh and Joshua the son of Nun
(Numbers 26:63-65).

603,550 - 601,730 = 1820 is the net loss to Israel in the wilderness ??

603,550 = 1676 years 190 days: ?? 

The third time that the Jews agreed to obey the law was on 455Tishri24:

Accordingly Ezra the priest brought the law before the congregation of men as well as of women and of all intelligent enough to listen, on the first day of the seventh month (Nehemiah 8:2)

And on the twenty-fourth day of this month the sons of Israel gathered themselves together with fasting and with sackcloth and dirt upon themselves (Nehemiah 9:1)

As for the rest of the people, the priests, the Levites, the gatekeepers, the singers, the Nethinim and everyone separating himself from the peoples of the lands to the law of the [true] God, their wives, their sons and their daughters, everyone having knowledge [and] understanding,
they were adhering to their brothers, their majestic ones, and coming into [liability to] a curse and into an oath, to walk in the law of the [true] God, which had been given by the hand of Moses the servant of the [true] God, and to keep and to perform all the commandments of Jehovah our Lord and his judicial decisions and his regulations
(Nehemiah 10:28,29).

The first time was on 1513Sivan3 at mount Sinai:

In the third month after the sons of Israel came out of the land of Egypt, on the same day, they came into the wilderness of Sinai (Exodus 19:1)

You yourselves have seen what I did to the Egyptians, that I might carry you on wings of eagles and bring you to myself. And now if you will strictly obey my voice and will indeed keep my covenant, then you will certainly become my special property out of all [other] peoples, because the whole earth belongs to me. And you yourselves will become to me a kingdom of priests and a holy nation. These are the words that you are to say to the sons of Israel.
So Moses came and called the older men of the people and set before them all these words that Jehovah had commanded him. After that all the people answered unanimously and said: All that Jehovah has spoken we are willing to do; Immediately Moses took back the words of the people to Jehovah
(Exodus 19:4-8).

And Jehovah went on to say to Moses: Go to the people, and you must sanctify them today and tomorrow, and they must wash their mantles. And they must prove ready for the third day, because on the third day Jehovah will come down before the eyes of all the people upon Mount Sinai (Exodus 19:10,11).

Finally he took the book of the covenant and read it in the ears of the people. Then they said: All that Jehovah has spoken we are willing to do and be obedient.
So Moses took the blood and sprinkled it upon the people and said: Here is the blood of the covenant that Jehovah has concluded with you as respects all these words
(Exodus 24:7,8)

The second time was in 1474Adar on the plains of Moab

YOU are all of you stationed today before Jehovah your God, the heads of your tribes, your older men and your officers, every man of Israel, your little ones, your wives, and your alien resident who is in the midst of your camp, from the gatherer of your wood to the drawer of your water, in order for you to enter into the covenant of Jehovah your God
and his oath, which Jehovah your God is concluding with you today; for the purpose of establishing you today as his people and that he may prove himself your God, just as he has promised you and just as he has sworn to your forefathers Abraham, Isaac and Jacob
(Deuteronomy 29:10-13).

The two interruptions of the wilderness and Babylon prefigure the intermission times and the second laws of FDS2 & FDS4