15633992 ÷ 649 
The aim is to understand the frequency of 649 in 15633992.

Step 1:
When dividing 1 by 649, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 649

Going ahead to step 2:
649 goes into 15 0 times with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Grab the next digit (6) from the dividend, add it to 15, then carry on: 156 / 649

Moving on to step 3:
156 divided by 649 is 0 with a remainder of 156.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 156, we end up with 156.
Grab the next digit (3) from the dividend, add it to 156, then carry on: 1563 / 649

Step 4:
649 can be fit into 1563 2 times, resulting in a remainder of 265.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 265 after subtracting 1298 from 1563.
Append the next digit (3) from the dividend to 265 and continue with: 2653 / 649

On to step 5:
When dividing 2653 by 649, we get 4 with a remainder of 57.
The number 4 becomes the next digit in our result. 
Result so far: 24.0
If we take 2596 away from 2653, we end up with 57.
Take the next digit (9) from the dividend and append it to 57, then repeat: 579 / 649

Advancing to step 6:
The number 649 fits into 579 0 times, leaving a remainder of 579.
The number 0 becomes the next digit in our result. 
Result so far: 240.0
Subtracting 0 from 579 leaves us with 579.
Grab the next digit (9) from the dividend, add it to 579, then carry on: 5799 / 649

Moving on to step 7:
The number 649 fits into 5799 8 times, leaving a remainder of 607.
Put 8 as the next digit of the answer. 
Result so far: 2408.0
If we subtract 5192 from 5799, we get 607.
Include the next digit (2) from the dividend after 607, then repeat: 6072 / 649

Going ahead to step 8:
The number 649 fits into 6072 9 times, leaving a remainder of 231.
The next digit of our result is 9. 
Result so far: 24089.0
If we take 5841 away from 6072, we end up with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Moving on to step 9:
2310 divided by 649 is 3 with a remainder of 363.
Put 3 as the next digit of the answer. 
Result so far: 24089.3
The remainder is 363 after subtracting 1947 from 2310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

Let's proceed to step 10:
The number 649 fits into 3630 5 times, leaving a remainder of 385.
The next digit of our result is 5. 
Result so far: 24089.35
Subtracting 3245 from 3630 leaves us with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Moving on to step 11:
3850 divided by 649 is 5 with a remainder of 605.
Use 5 as the next digit of our solution. 
Result so far: 24089.355
If we subtract 3245 from 3850, we get 605.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6050, and continue the process.

After the division, we end up with 24089.355 and a remainder of 0.0605.