We look at the division of 5124555 by 855 
The aim is to understand the frequency of 855 in 5124555.

Let's proceed to step 1:
When dividing 5 by 855, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 855

Moving on to step 2:
The number 855 fits into 51 0 times, leaving a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Bring next digit (2) of the dividend behind the 51 and repeat the process: 512 / 855

Let's proceed to step 3:
The number 855 fits into 512 0 times, leaving a remainder of 512.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 512 and we're left with 512.
Grab the next digit (4) from the dividend, add it to 512, then carry on: 5124 / 855

Let's proceed to step 4:
5124 divided by 855 is 5 with a remainder of 849.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 4275 from 5124 leaves us with 849.
Grab the next digit (5) from the dividend, add it to 849, then carry on: 8495 / 855

Step 5:
855 goes into 8495 9 times with a remainder of 800.
The next digit of our result is 9. 
Result so far: 59.0
Subtract 7695 from 8495 to get 800.
Grab the next digit (5) from the dividend, add it to 800, then carry on: 8005 / 855

Step 6:
If we divide 8005 by 855, we get 9 and a remainder of 310.
Use 9 as the next digit of our solution. 
Result so far: 599.0
Subtract 7695 from 8005 to get 310.
Take the next digit (5) from the dividend and append it to 310, then repeat: 3105 / 855

Let's proceed to step 7:
855 goes into 3105 3 times with a remainder of 540.
The number 3 becomes the next digit in our result. 
Result so far: 5993.0
If we subtract 2565 from 3105, we get 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Moving on to step 8:
If we divide 5400 by 855, we get 6 and a remainder of 270.
Put 6 as the next digit of the answer. 
Result so far: 5993.6
If we subtract 5130 from 5400, we get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Moving on to step 9:
The number 855 fits into 2700 3 times, leaving a remainder of 135.
The next digit of our result is 3. 
Result so far: 5993.63
Subtract 2565 from 2700 to get 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Step 10:
The number 855 fits into 1350 1 times, leaving a remainder of 495.
Record the quotient 1 as the next digit in the result. 
Result so far: 5993.631
Subtract 855 from 1350 to get 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Advancing to step 11:
4950 divided by 855 is 5 with a remainder of 675.
The number 5 becomes the next digit in our result. 
Result so far: 5993.6315
If we take 4275 away from 4950, we end up with 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Advancing to step 12:
The number 855 fits into 6750 7 times, leaving a remainder of 765.
The next digit of our result is 7. 
Result so far: 5993.63157
The remainder is 765 after subtracting 5985 from 6750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7650, and continue the process.

Advancing to step 13:
When dividing 7650 by 855, we get 8 with a remainder of 810.
Use 8 as the next digit of our solution. 
Result so far: 5993.631578
Subtracting 6840 from 7650 leaves us with 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8100, and continue the process.

Moving on to step 14:
8100 divided by 855 is 9 with a remainder of 405.
Write down 9 as next digit of the result. 
Result so far: 5993.6315789
Deduct 7695 from 8100 and we're left with 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Moving on to step 15:
855 can be fit into 4050 4 times, resulting in a remainder of 630.
Use 4 as the next digit of our solution. 
Result so far: 5993.63157894
If we take 3420 away from 4050, we end up with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

The final outcome is 5993.63157894, with a leftover of 6.3e-07.