We're dividing 51963484 by 503 
The aim is to understand the frequency of 503 in 51963484.

Advancing to step 1:
503 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 503

Let's proceed to step 2:
51 divided by 503 is 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Grab the next digit (9) from the dividend, add it to 51, then carry on: 519 / 503

Let's proceed to step 3:
503 goes into 519 1 times with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 503 from 519 to get 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 503

Moving on to step 4:
When dividing 166 by 503, we get 0 with a remainder of 166.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 166, we get 166.
Include the next digit (3) from the dividend after 166, then repeat: 1663 / 503

On to step 5:
1663 divided by 503 is 3 with a remainder of 154.
The number 3 becomes the next digit in our result. 
Result so far: 103.0
Deduct 1509 from 1663 and we're left with 154.
Include the next digit (4) from the dividend after 154, then repeat: 1544 / 503

Let's proceed to step 6:
1544 divided by 503 is 3 with a remainder of 35.
Put 3 as the next digit of the answer. 
Result so far: 1033.0
Subtracting 1509 from 1544 leaves us with 35.
Bring next digit (8) of the dividend behind the 35 and repeat the process: 358 / 503

Let's proceed to step 7:
503 goes into 358 0 times with a remainder of 358.
The next digit of our result is 0. 
Result so far: 10330.0
If we subtract 0 from 358, we get 358.
Append the next digit (4) from the dividend to 358 and continue with: 3584 / 503

Moving on to step 8:
3584 divided by 503 is 7 with a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 103307.0
The remainder is 63 after subtracting 3521 from 3584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Let's proceed to step 9:
503 can be fit into 630 1 times, resulting in a remainder of 127.
Put 1 as the next digit of the answer. 
Result so far: 103307.1
Deduct 503 from 630 and we're left with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Moving on to step 10:
503 can be fit into 1270 2 times, resulting in a remainder of 264.
The next digit of our result is 2. 
Result so far: 103307.12
Subtracting 1006 from 1270 leaves us with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

On to step 11:
If we divide 2640 by 503, we get 5 and a remainder of 125.
The next digit of our result is 5. 
Result so far: 103307.125
The remainder is 125 after subtracting 2515 from 2640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 12:
503 goes into 1250 2 times with a remainder of 244.
The number 2 becomes the next digit in our result. 
Result so far: 103307.1252
The remainder is 244 after subtracting 1006 from 1250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Going ahead to step 13:
When dividing 2440 by 503, we get 4 with a remainder of 428.
Record the quotient 4 as the next digit in the result. 
Result so far: 103307.12524
If we subtract 2012 from 2440, we get 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Moving on to step 14:
503 goes into 4280 8 times with a remainder of 256.
Write down 8 as next digit of the result. 
Result so far: 103307.125248
If we take 4024 away from 4280, we end up with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Going ahead to step 15:
The number 503 fits into 2560 5 times, leaving a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 103307.1252485
Subtract 2515 from 2560 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 16:
503 goes into 450 0 times with a remainder of 450.
Use 0 as the next digit of our solution. 
Result so far: 103307.1252485
If we take 0 away from 450, we end up with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

The final result is 103307.1252485 with a remainder of 4.5e-07.