Haha, you're funny, OP!
When losing significant amounts of weight, over long period of time, one can do nothing to 'ensure' linear losses. You can't 'ensure' losses at all - that side of the equation is COMPLETELY out of your control. The only part you can control are the inputs, which would be sticking to your plan of choice like glue and focusing on better sleep, daily moving, and other health promoting activities. The weight takes care of itself.
As for how much I've lost per week? Averaged out its probably less than .25 pounds. Because in real life, with maintenance breaks and pregnancies and easy diet times and skin-of-my-teeth diet times, my weight loss has ranged from 4+ pounds per week to stalls and gains, and EVERYTHING in between. And it has taken four years.
But did the rate really matter? Not one whit! I can't calculate my yield of pounds or recommend a steady course, and yet the fact remains I've lost a small person and am still losing. The weight is GONE, and it didn't matter how long it took or how many fits, starts, and out and out battles I had to have with myself over it. When you're doing this because you have to, for LIFE, the scope of time it takes to get to goal and learn to stay there becomes quite unimportant. Your perspective is not one of instant gratification or even consistent results being needed to keep you going, but that you have no other choice than to keep working at it, the best you can, every day for the rest of your life. THAT persistence pays off in tangible ways. So if you want to 'ensure' your losses, then 'ensure' that you never give up and refuse to quit trying, no matter WHAT life or be scale may be doing.
That's my best, most compassionate advice.