We look at the division of 56466909 by 503 
The aim is to understand the frequency of 503 in 56466909.

Moving on to step 1:
503 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (6) from the dividend, attach it to 5 and continue: 56 / 503

Moving on to step 2:
When dividing 56 by 503, we get 0 with a remainder of 56.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 56 to get 56.
Grab the next digit (4) from the dividend, add it to 56, then carry on: 564 / 503

On to step 3:
503 can be fit into 564 1 times, resulting in a remainder of 61.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 503 from 564 to get 61.
Append the next digit (6) from the dividend to 61 and continue with: 616 / 503

Let's proceed to step 4:
If we divide 616 by 503, we get 1 and a remainder of 113.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtract 503 from 616 to get 113.
Fetch the next digit (6) from the dividend, attach it to 113 and continue: 1136 / 503

Step 5:
If we divide 1136 by 503, we get 2 and a remainder of 130.
The next digit of our result is 2. 
Result so far: 112.0
Subtract 1006 from 1136 to get 130.
Take the next digit (9) from the dividend and append it to 130, then repeat: 1309 / 503

Advancing to step 6:
503 goes into 1309 2 times with a remainder of 303.
Write down 2 as next digit of the result. 
Result so far: 1122.0
If we take 1006 away from 1309, we end up with 303.
Fetch the next digit (0) from the dividend, attach it to 303 and continue: 3030 / 503

On to step 7:
The number 503 fits into 3030 6 times, leaving a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 11226.0
If we subtract 3018 from 3030, we get 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 503

Step 8:
If we divide 129 by 503, we get 0 and a remainder of 129.
Record the quotient 0 as the next digit in the result. 
Result so far: 112260.0
The remainder is 129 after subtracting 0 from 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Moving on to step 9:
1290 divided by 503 is 2 with a remainder of 284.
Use 2 as the next digit of our solution. 
Result so far: 112260.2
If we subtract 1006 from 1290, we get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Let's proceed to step 10:
503 can be fit into 2840 5 times, resulting in a remainder of 325.
Put 5 as the next digit of the answer. 
Result so far: 112260.25
Subtracting 2515 from 2840 leaves us with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Moving on to step 11:
503 goes into 3250 6 times with a remainder of 232.
The number 6 becomes the next digit in our result. 
Result so far: 112260.256
The remainder is 232 after subtracting 3018 from 3250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

On to step 12:
If we divide 2320 by 503, we get 4 and a remainder of 308.
The next digit of our result is 4. 
Result so far: 112260.2564
Subtract 2012 from 2320 to get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Step 13:
503 goes into 3080 6 times with a remainder of 62.
Write down 6 as next digit of the result. 
Result so far: 112260.25646
Subtract 3018 from 3080 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 14:
If we divide 620 by 503, we get 1 and a remainder of 117.
The number 1 becomes the next digit in our result. 
Result so far: 112260.256461
Subtract 503 from 620 to get 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

On to step 15:
When dividing 1170 by 503, we get 2 with a remainder of 164.
The next digit of our result is 2. 
Result so far: 112260.2564612
Subtract 1006 from 1170 to 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.

Step 16:
503 can be fit into 1640 3 times, resulting in a remainder of 131.
The number 3 becomes the next digit in our result. 
Result so far: 112260.25646123
If we take 1509 away from 1640, we end up with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

After the division, we end up with 112260.25646123 and a remainder of 1.31e-07.