Uh, hunh? (I really do feel slow around you. lol)
I'm busy thinking, what would I do if God gave me a huge powerful, ain't-no-way-this-is-just-in-my-mind promise? Say he tells us (hubby is always part of me), "I'm going to give you a billion dollars." What's the first thing we'd do? Contact my brother, the financial adviser. (Hey we've dreamed of winning the lottery enough to already know what to do. lol)
So his first question is, "Where is the money now?"
See where that one tanks immediately? And then see what we'd be doing next to "prepare" for this? And then it's ten years later, and no money. Eeek!!!!
So, God's plans aren't time contingent. Well, in both cases it really is. Abram would have to be alive up to 9 months before baby is born. And, if we die then that wasn't ever a promise from God. So, yeah, there is some contingency going on there. (Not to worry. God has never made any such promise to us.)
So, I'm thinking God's time continent, just not always what we'd consider "speedy." Like he told Adam and Eve the Savior is coming. They start naming their kids for that promise, but it doesn't happen for millenniums. Not speedy, but timely. It had to be where it happened when it happened, because, like God tells Abram about in Chapter 15, "the iniquities of the Amorites is not yet complete." Just like it wouldn't be fair to destroy all those nations at that moment, the timing had to be just and right for Jesus to come. Sooner would have been unfair to the people of Rome and Judah. And later, then Nero wouldn't have been around to disperse the message by the simple act of trying to annihilate all those who trusted Jesus was the promised Messiah.