We're dividing 90802558 by 518 
The aim is to understand the frequency of 518 in 90802558.

On to step 1:
9 divided by 518 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 518

Going ahead to step 2:
90 divided by 518 is 0 with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Grab the next digit (8) from the dividend, add it to 90, then carry on: 908 / 518

Advancing to step 3:
518 goes into 908 1 times with a remainder of 390.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 518 from 908 leaves us with 390.
Bring next digit (0) of the dividend behind the 390 and repeat the process: 3900 / 518

Step 4:
518 goes into 3900 7 times with a remainder of 274.
The next digit of our result is 7. 
Result so far: 17.0
If we take 3626 away from 3900, we end up with 274.
Include the next digit (2) from the dividend after 274, then repeat: 2742 / 518

Step 5:
518 goes into 2742 5 times with a remainder of 152.
Write down 5 as next digit of the result. 
Result so far: 175.0
If we take 2590 away from 2742, we end up with 152.
Take the next digit (5) from the dividend and append it to 152, then repeat: 1525 / 518

Moving on to step 6:
If we divide 1525 by 518, we get 2 and a remainder of 489.
The next digit of our result is 2. 
Result so far: 1752.0
If we take 1036 away from 1525, we end up with 489.
Append the next digit (5) from the dividend to 489 and continue with: 4895 / 518

Moving on to step 7:
If we divide 4895 by 518, we get 9 and a remainder of 233.
Use 9 as the next digit of our solution. 
Result so far: 17529.0
The remainder is 233 after subtracting 4662 from 4895.
Grab the next digit (8) from the dividend, add it to 233, then carry on: 2338 / 518

Let's proceed to step 8:
2338 divided by 518 is 4 with a remainder of 266.
Put 4 as the next digit of the answer. 
Result so far: 175294.0
If we take 2072 away from 2338, we end up with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Going ahead to step 9:
2660 divided by 518 is 5 with a remainder of 70.
The number 5 becomes the next digit in our result. 
Result so far: 175294.5
If we take 2590 away from 2660, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 10:
518 goes into 700 1 times with a remainder of 182.
The number 1 becomes the next digit in our result. 
Result so far: 175294.51
If we subtract 518 from 700, we get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Moving on to step 11:
1820 divided by 518 is 3 with a remainder of 266.
The next digit of our result is 3. 
Result so far: 175294.513
The remainder is 266 after subtracting 1554 from 1820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Moving on to step 12:
If we divide 2660 by 518, we get 5 and a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 175294.5135
The remainder is 70 after subtracting 2590 from 2660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 13:
518 can be fit into 700 1 times, resulting in a remainder of 182.
Use 1 as the next digit of our solution. 
Result so far: 175294.51351
If we take 518 away from 700, we end up with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Advancing to step 14:
518 can be fit into 1820 3 times, resulting in a remainder of 266.
Record the quotient 3 as the next digit in the result. 
Result so far: 175294.513513
If we take 1554 away from 1820, we end up with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Step 15:
518 goes into 2660 5 times with a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 175294.5135135
If we take 2590 away from 2660, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 16:
The number 518 fits into 700 1 times, leaving a remainder of 182.
The next digit of our result is 1. 
Result so far: 175294.51351351
Deduct 518 from 700 and we're left with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

The final outcome is 175294.51351351, with a leftover of 1.82e-07.