We look at the division of 15535599 by 550 
The aim is to understand the frequency of 550 in 15535599.

On to step 1:
550 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 550

Let's proceed to step 2:
550 goes into 15 0 times with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 550

Advancing to step 3:
550 goes into 155 0 times with a remainder of 155.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 155 after subtracting 0 from 155.
Append the next digit (3) from the dividend to 155 and continue with: 1553 / 550

Let's proceed to step 4:
550 can be fit into 1553 2 times, resulting in a remainder of 453.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 1100 from 1553 leaves us with 453.
Grab the next digit (5) from the dividend, add it to 453, then carry on: 4535 / 550

Moving on to step 5:
When dividing 4535 by 550, we get 8 with a remainder of 135.
Use 8 as the next digit of our solution. 
Result so far: 28.0
If we subtract 4400 from 4535, we get 135.
Include the next digit (5) from the dividend after 135, then repeat: 1355 / 550

Step 6:
If we divide 1355 by 550, we get 2 and a remainder of 255.
Put 2 as the next digit of the answer. 
Result so far: 282.0
Deduct 1100 from 1355 and we're left with 255.
Append the next digit (9) from the dividend to 255 and continue with: 2559 / 550

Step 7:
When dividing 2559 by 550, we get 4 with a remainder of 359.
Write down 4 as next digit of the result. 
Result so far: 2824.0
The remainder is 359 after subtracting 2200 from 2559.
Include the next digit (9) from the dividend after 359, then repeat: 3599 / 550

Advancing to step 8:
3599 divided by 550 is 6 with a remainder of 299.
Use 6 as the next digit of our solution. 
Result so far: 28246.0
If we take 3300 away from 3599, we end up with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Step 9:
If we divide 2990 by 550, we get 5 and a remainder of 240.
The next digit of our result is 5. 
Result so far: 28246.5
The remainder is 240 after subtracting 2750 from 2990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Let's proceed to step 10:
If we divide 2400 by 550, we get 4 and a remainder of 200.
Record the quotient 4 as the next digit in the result. 
Result so far: 28246.54
The remainder is 200 after subtracting 2200 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 11:
550 can be fit into 2000 3 times, resulting in a remainder of 350.
The number 3 becomes the next digit in our result. 
Result so far: 28246.543
Subtract 1650 from 2000 to get 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Advancing to step 12:
3500 divided by 550 is 6 with a remainder of 200.
Write down 6 as next digit of the result. 
Result so far: 28246.5436
Subtracting 3300 from 3500 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 13:
The number 550 fits into 2000 3 times, leaving a remainder of 350.
Put 3 as the next digit of the answer. 
Result so far: 28246.54363
If we subtract 1650 from 2000, we get 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Let's proceed to step 14:
If we divide 3500 by 550, we get 6 and a remainder of 200.
Write down 6 as next digit of the result. 
Result so far: 28246.543636
If we take 3300 away from 3500, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 15:
The number 550 fits into 2000 3 times, leaving a remainder of 350.
Write down 3 as next digit of the result. 
Result so far: 28246.5436363
Subtracting 1650 from 2000 leaves us with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Moving on to step 16:
550 goes into 3500 6 times with a remainder of 200.
Use 6 as the next digit of our solution. 
Result so far: 28246.54363636
The remainder is 200 after subtracting 3300 from 3500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final result is 28246.54363636 with a remainder of 2e-07.