We look at the division of 63725916 by 517 
The aim is to understand the frequency of 517 in 63725916.

Going ahead to step 1:
If we divide 6 by 517, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 517

Moving on to step 2:
517 goes into 63 0 times with a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Fetch the next digit (7) from the dividend, attach it to 63 and continue: 637 / 517

On to step 3:
When dividing 637 by 517, we get 1 with a remainder of 120.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 517 from 637 leaves us with 120.
Append the next digit (2) from the dividend to 120 and continue with: 1202 / 517

Going ahead to step 4:
The number 517 fits into 1202 2 times, leaving a remainder of 168.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 1034 from 1202 and we're left with 168.
Append the next digit (5) from the dividend to 168 and continue with: 1685 / 517

Advancing to step 5:
The number 517 fits into 1685 3 times, leaving a remainder of 134.
The number 3 becomes the next digit in our result. 
Result so far: 123.0
If we take 1551 away from 1685, we end up with 134.
Include the next digit (9) from the dividend after 134, then repeat: 1349 / 517

Let's proceed to step 6:
517 can be fit into 1349 2 times, resulting in a remainder of 315.
Use 2 as the next digit of our solution. 
Result so far: 1232.0
If we take 1034 away from 1349, we end up with 315.
Fetch the next digit (1) from the dividend, attach it to 315 and continue: 3151 / 517

Advancing to step 7:
If we divide 3151 by 517, we get 6 and a remainder of 49.
Write down 6 as next digit of the result. 
Result so far: 12326.0
If we subtract 3102 from 3151, we get 49.
Include the next digit (6) from the dividend after 49, then repeat: 496 / 517

Going ahead to step 8:
If we divide 496 by 517, we get 0 and a remainder of 496.
Use 0 as the next digit of our solution. 
Result so far: 123260.0
Subtracting 0 from 496 leaves us with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

On to step 9:
When dividing 4960 by 517, we get 9 with a remainder of 307.
Record the quotient 9 as the next digit in the result. 
Result so far: 123260.9
Deduct 4653 from 4960 and we're left with 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

On to step 10:
3070 divided by 517 is 5 with a remainder of 485.
Use 5 as the next digit of our solution. 
Result so far: 123260.95
Deduct 2585 from 3070 and we're left with 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

On to step 11:
The number 517 fits into 4850 9 times, leaving a remainder of 197.
The next digit of our result is 9. 
Result so far: 123260.959
The remainder is 197 after subtracting 4653 from 4850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

On to step 12:
1970 divided by 517 is 3 with a remainder of 419.
Write down 3 as next digit of the result. 
Result so far: 123260.9593
Subtracting 1551 from 1970 leaves us with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

Moving on to step 13:
517 can be fit into 4190 8 times, resulting in a remainder of 54.
Write down 8 as next digit of the result. 
Result so far: 123260.95938
If we take 4136 away from 4190, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 14:
517 goes into 540 1 times with a remainder of 23.
Use 1 as the next digit of our solution. 
Result so far: 123260.959381
Subtract 517 from 540 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 15:
517 goes into 230 0 times with a remainder of 230.
Put 0 as the next digit of the answer. 
Result so far: 123260.959381
Subtracting 0 from 230 leaves us with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Advancing to step 16:
If we divide 2300 by 517, we get 4 and a remainder of 232.
Record the quotient 4 as the next digit in the result. 
Result so far: 123260.95938104
The remainder is 232 after subtracting 2068 from 2300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

The final result is 123260.95938104 with a remainder of 2.32e-07.