We're dividing 90695539 by 503 
The aim is to understand the frequency of 503 in 90695539.

Going ahead to step 1:
503 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 503

Going ahead to step 2:
90 divided by 503 is 0 with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Take the next digit (6) from the dividend and append it to 90, then repeat: 906 / 503

On to step 3:
503 can be fit into 906 1 times, resulting in a remainder of 403.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 503 from 906 to get 403.
Append the next digit (9) from the dividend to 403 and continue with: 4039 / 503

Advancing to step 4:
The number 503 fits into 4039 8 times, leaving a remainder of 15.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
If we take 4024 away from 4039, we end up with 15.
Include the next digit (5) from the dividend after 15, then repeat: 155 / 503

Step 5:
The number 503 fits into 155 0 times, leaving a remainder of 155.
Write down 0 as next digit of the result. 
Result so far: 180.0
The remainder is 155 after subtracting 0 from 155.
Fetch the next digit (5) from the dividend, attach it to 155 and continue: 1555 / 503

Advancing to step 6:
503 can be fit into 1555 3 times, resulting in a remainder of 46.
Use 3 as the next digit of our solution. 
Result so far: 1803.0
The remainder is 46 after subtracting 1509 from 1555.
Include the next digit (3) from the dividend after 46, then repeat: 463 / 503

Moving on to step 7:
When dividing 463 by 503, we get 0 with a remainder of 463.
The number 0 becomes the next digit in our result. 
Result so far: 18030.0
The remainder is 463 after subtracting 0 from 463.
Take the next digit (9) from the dividend and append it to 463, then repeat: 4639 / 503

On to step 8:
The number 503 fits into 4639 9 times, leaving a remainder of 112.
The next digit of our result is 9. 
Result so far: 180309.0
If we subtract 4527 from 4639, we get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

On to step 9:
503 can be fit into 1120 2 times, resulting in a remainder of 114.
Put 2 as the next digit of the answer. 
Result so far: 180309.2
The remainder is 114 after subtracting 1006 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Step 10:
503 goes into 1140 2 times with a remainder of 134.
Use 2 as the next digit of our solution. 
Result so far: 180309.22
Deduct 1006 from 1140 and we're left with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

The final result is 180309.22 with a remainder of 0.134.