You do not know why? The Church age, where the Father provides the Son with His Bride is why.The why the 'gap' between the 69 and 70 years?
As for the "gaps"? Here are the "gaps".....more than enough to convince anybody.
Luk 13:35
Behold, your house is left unto you desolate: and verily I say unto you, Ye shall not see me, until the time come when ye shall say, Blessed is he that cometh in the name of the Lord.
Luk 21:24
And they shall fall by the edge of the sword, and shall be led away captive into all nations: and Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles be fulfilled.
Rom 11:25
For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in