We look at the division of 71814467 by 503 
The aim is to understand the frequency of 503 in 71814467.

Moving on to step 1:
503 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 503

Step 2:
When dividing 71 by 503, we get 0 with a remainder of 71.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 71, we get 71.
Bring next digit (8) of the dividend behind the 71 and repeat the process: 718 / 503

Going ahead to step 3:
503 goes into 718 1 times with a remainder of 215.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 503 away from 718, we end up with 215.
Take the next digit (1) from the dividend and append it to 215, then repeat: 2151 / 503

On to step 4:
503 can be fit into 2151 4 times, resulting in a remainder of 139.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 139 after subtracting 2012 from 2151.
Take the next digit (4) from the dividend and append it to 139, then repeat: 1394 / 503

On to step 5:
503 goes into 1394 2 times with a remainder of 388.
Use 2 as the next digit of our solution. 
Result so far: 142.0
If we subtract 1006 from 1394, we get 388.
Bring next digit (4) of the dividend behind the 388 and repeat the process: 3884 / 503

Let's proceed to step 6:
503 goes into 3884 7 times with a remainder of 363.
Write down 7 as next digit of the result. 
Result so far: 1427.0
Deduct 3521 from 3884 and we're left with 363.
Bring next digit (6) of the dividend behind the 363 and repeat the process: 3636 / 503

Let's proceed to step 7:
3636 divided by 503 is 7 with a remainder of 115.
Write down 7 as next digit of the result. 
Result so far: 14277.0
If we subtract 3521 from 3636, we get 115.
Grab the next digit (7) from the dividend, add it to 115, then carry on: 1157 / 503

Let's proceed to step 8:
1157 divided by 503 is 2 with a remainder of 151.
The number 2 becomes the next digit in our result. 
Result so far: 142772.0
If we take 1006 away from 1157, we end up with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Advancing to step 9:
1510 divided by 503 is 3 with a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 142772.3
Deduct 1509 from 1510 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 10:
10 divided by 503 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 142772.3
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 11:
503 can be fit into 100 0 times, resulting in a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 142772.3
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

After the division, we end up with 142772.3 and a remainder of 0.01.