We're dividing 68380370 by 503 
The aim is to understand the frequency of 503 in 68380370.

On to step 1:
503 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 503

On to step 2:
68 divided by 503 is 0 with a remainder of 68.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Fetch the next digit (3) from the dividend, attach it to 68 and continue: 683 / 503

On to step 3:
683 divided by 503 is 1 with a remainder of 180.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 503 from 683 to get 180.
Fetch the next digit (8) from the dividend, attach it to 180 and continue: 1808 / 503

Step 4:
503 can be fit into 1808 3 times, resulting in a remainder of 299.
The next digit of our result is 3. 
Result so far: 13.0
Subtract 1509 from 1808 to get 299.
Fetch the next digit (0) from the dividend, attach it to 299 and continue: 2990 / 503

Let's proceed to step 5:
2990 divided by 503 is 5 with a remainder of 475.
Record the quotient 5 as the next digit in the result. 
Result so far: 135.0
Deduct 2515 from 2990 and we're left with 475.
Take the next digit (3) from the dividend and append it to 475, then repeat: 4753 / 503

Advancing to step 6:
503 can be fit into 4753 9 times, resulting in a remainder of 226.
Put 9 as the next digit of the answer. 
Result so far: 1359.0
Deduct 4527 from 4753 and we're left with 226.
Bring next digit (7) of the dividend behind the 226 and repeat the process: 2267 / 503

Going ahead to step 7:
2267 divided by 503 is 4 with a remainder of 255.
The number 4 becomes the next digit in our result. 
Result so far: 13594.0
Subtracting 2012 from 2267 leaves us with 255.
Include the next digit (0) from the dividend after 255, then repeat: 2550 / 503

Let's proceed to step 8:
When dividing 2550 by 503, we get 5 with a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 135945.0
The remainder is 35 after subtracting 2515 from 2550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 9:
503 can be fit into 350 0 times, resulting in a remainder of 350.
Use 0 as the next digit of our solution. 
Result so far: 135945.0
Subtracting 0 from 350 leaves us with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Step 10:
The number 503 fits into 3500 6 times, leaving a remainder of 482.
The number 6 becomes the next digit in our result. 
Result so far: 135945.06
Subtract 3018 from 3500 to get 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Let's proceed to step 11:
When dividing 4820 by 503, we get 9 with a remainder of 293.
The number 9 becomes the next digit in our result. 
Result so far: 135945.069
Subtracting 4527 from 4820 leaves us with 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Moving on to step 12:
When dividing 2930 by 503, we get 5 with a remainder of 415.
Record the quotient 5 as the next digit in the result. 
Result so far: 135945.0695
The remainder is 415 after subtracting 2515 from 2930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Let's proceed to step 13:
503 goes into 4150 8 times with a remainder of 126.
Put 8 as the next digit of the answer. 
Result so far: 135945.06958
Subtract 4024 from 4150 to get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Step 14:
If we divide 1260 by 503, we get 2 and a remainder of 254.
Put 2 as the next digit of the answer. 
Result so far: 135945.069582
If we take 1006 away from 1260, we end up with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

On to step 15:
2540 divided by 503 is 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 135945.0695825
Deduct 2515 from 2540 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 16:
250 divided by 503 is 0 with a remainder of 250.
The number 0 becomes the next digit in our result. 
Result so far: 135945.0695825
Subtract 0 from 250 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

The final result is 135945.0695825 with a remainder of 2.5e-07.