We look at the division of 8556077 by 518 
The aim is to understand the frequency of 518 in 8556077.

On to step 1:
If we divide 8 by 518, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 518

Advancing to step 2:
When dividing 85 by 518, we get 0 with a remainder of 85.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 85 after subtracting 0 from 85.
Append the next digit (5) from the dividend to 85 and continue with: 855 / 518

Step 3:
If we divide 855 by 518, we get 1 and a remainder of 337.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 518 from 855, we get 337.
Bring next digit (6) of the dividend behind the 337 and repeat the process: 3376 / 518

Advancing to step 4:
3376 divided by 518 is 6 with a remainder of 268.
Write down 6 as next digit of the result. 
Result so far: 16.0
If we take 3108 away from 3376, we end up with 268.
Grab the next digit (0) from the dividend, add it to 268, then carry on: 2680 / 518

Step 5:
When dividing 2680 by 518, we get 5 with a remainder of 90.
Put 5 as the next digit of the answer. 
Result so far: 165.0
The remainder is 90 after subtracting 2590 from 2680.
Fetch the next digit (7) from the dividend, attach it to 90 and continue: 907 / 518

On to step 6:
518 goes into 907 1 times with a remainder of 389.
The number 1 becomes the next digit in our result. 
Result so far: 1651.0
The remainder is 389 after subtracting 518 from 907.
Append the next digit (7) from the dividend to 389 and continue with: 3897 / 518

Going ahead to step 7:
518 goes into 3897 7 times with a remainder of 271.
The next digit of our result is 7. 
Result so far: 16517.0
Subtract 3626 from 3897 to get 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

On to step 8:
2710 divided by 518 is 5 with a remainder of 120.
The next digit of our result is 5. 
Result so far: 16517.5
Subtract 2590 from 2710 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 9:
When dividing 1200 by 518, we get 2 with a remainder of 164.
Record the quotient 2 as the next digit in the result. 
Result so far: 16517.52
If we subtract 1036 from 1200, we get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Let's proceed to step 10:
The number 518 fits into 1640 3 times, leaving a remainder of 86.
Record the quotient 3 as the next digit in the result. 
Result so far: 16517.523
If we take 1554 away from 1640, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 11:
The number 518 fits into 860 1 times, leaving a remainder of 342.
Record the quotient 1 as the next digit in the result. 
Result so far: 16517.5231
Deduct 518 from 860 and we're left with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Step 12:
The number 518 fits into 3420 6 times, leaving a remainder of 312.
Put 6 as the next digit of the answer. 
Result so far: 16517.52316
Deduct 3108 from 3420 and we're left with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Step 13:
When dividing 3120 by 518, we get 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 16517.523166
Subtracting 3108 from 3120 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 16517.523166 and a remainder of 1.2e-06.