We look at the division of 58045625 by 503 
The aim is to understand the frequency of 503 in 58045625.

Let's proceed to step 1:
503 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 503

Advancing to step 2:
The number 503 fits into 58 0 times, leaving a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 58, we end up with 58.
Bring next digit (0) of the dividend behind the 58 and repeat the process: 580 / 503

Moving on to step 3:
503 can be fit into 580 1 times, resulting in a remainder of 77.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 503 from 580 to get 77.
Fetch the next digit (4) from the dividend, attach it to 77 and continue: 774 / 503

On to step 4:
When dividing 774 by 503, we get 1 with a remainder of 271.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 503 from 774, we get 271.
Grab the next digit (5) from the dividend, add it to 271, then carry on: 2715 / 503

Step 5:
2715 divided by 503 is 5 with a remainder of 200.
Put 5 as the next digit of the answer. 
Result so far: 115.0
If we subtract 2515 from 2715, we get 200.
Include the next digit (6) from the dividend after 200, then repeat: 2006 / 503

Advancing to step 6:
When dividing 2006 by 503, we get 3 with a remainder of 497.
Put 3 as the next digit of the answer. 
Result so far: 1153.0
Subtracting 1509 from 2006 leaves us with 497.
Append the next digit (2) from the dividend to 497 and continue with: 4972 / 503

Going ahead to step 7:
503 can be fit into 4972 9 times, resulting in a remainder of 445.
Record the quotient 9 as the next digit in the result. 
Result so far: 11539.0
Subtract 4527 from 4972 to get 445.
Include the next digit (5) from the dividend after 445, then repeat: 4455 / 503

Advancing to step 8:
If we divide 4455 by 503, we get 8 and a remainder of 431.
Write down 8 as next digit of the result. 
Result so far: 115398.0
If we take 4024 away from 4455, we end up with 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

Moving on to step 9:
503 can be fit into 4310 8 times, resulting in a remainder of 286.
Put 8 as the next digit of the answer. 
Result so far: 115398.8
If we take 4024 away from 4310, we end up with 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

On to step 10:
503 goes into 2860 5 times with a remainder of 345.
Use 5 as the next digit of our solution. 
Result so far: 115398.85
The remainder is 345 after subtracting 2515 from 2860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

On to step 11:
If we divide 3450 by 503, we get 6 and a remainder of 432.
Record the quotient 6 as the next digit in the result. 
Result so far: 115398.856
The remainder is 432 after subtracting 3018 from 3450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

On to step 12:
4320 divided by 503 is 8 with a remainder of 296.
Write down 8 as next digit of the result. 
Result so far: 115398.8568
If we subtract 4024 from 4320, we get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Step 13:
When dividing 2960 by 503, we get 5 with a remainder of 445.
Write down 5 as next digit of the result. 
Result so far: 115398.85685
Subtract 2515 from 2960 to get 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

On to step 14:
If we divide 4450 by 503, we get 8 and a remainder of 426.
Use 8 as the next digit of our solution. 
Result so far: 115398.856858
If we take 4024 away from 4450, we end up with 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Going ahead to step 15:
503 can be fit into 4260 8 times, resulting in a remainder of 236.
Use 8 as the next digit of our solution. 
Result so far: 115398.8568588
If we take 4024 away from 4260, we end up with 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

The final result is 115398.8568588 with a remainder of 2.36e-06.