lol, So one dispensation ended and another began at 9 or 7?
No.
The Believing Remnant did not simply disappear.
Rather, where things were headed for them and their nation was interrupted, and then began to diminish away.
And sometime after it's direction was interrupted, another began, within the one that was now diminishing away.
Sort of like the transition from the Law, not to its yet being done away, even as its Prophesied Kingdom began to be preached in Matthew.
Sort of like one now sees with television shows and movies - where while one show is ending, they zoom it down and into a smaller image, where it plays out to its end, even as another image begins playing the next movie or show, or even the news.
Here, the schematics on this link provide an image and relevant passages of basically the same view I hold.
The first chart is Israel had the Mystery preached by Paul not interrupted their Prophesied aspect.
The second chart shows what happened to that with the Mystery's interruption.
http://clearspringsbiblechurch.org/dispensational-chart/