We look at the division of 65402431 by 517 
The aim is to understand the frequency of 517 in 65402431.

Moving on 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
Subtract 0 from 6 to get 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 517

Step 2:
517 can be fit into 65 0 times, resulting in a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 65, we get 65.
Fetch the next digit (4) from the dividend, attach it to 65 and continue: 654 / 517

Moving on to step 3:
654 divided by 517 is 1 with a remainder of 137.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 517 from 654 to get 137.
Bring next digit (0) of the dividend behind the 137 and repeat the process: 1370 / 517

Moving on to step 4:
517 goes into 1370 2 times with a remainder of 336.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtract 1034 from 1370 to get 336.
Fetch the next digit (2) from the dividend, attach it to 336 and continue: 3362 / 517

Let's proceed to step 5:
517 goes into 3362 6 times with a remainder of 260.
The number 6 becomes the next digit in our result. 
Result so far: 126.0
Deduct 3102 from 3362 and we're left with 260.
Bring next digit (4) of the dividend behind the 260 and repeat the process: 2604 / 517

Moving on to step 6:
The number 517 fits into 2604 5 times, leaving a remainder of 19.
Write down 5 as next digit of the result. 
Result so far: 1265.0
Subtract 2585 from 2604 to get 19.
Take the next digit (3) from the dividend and append it to 19, then repeat: 193 / 517

Going ahead to step 7:
517 can be fit into 193 0 times, resulting in a remainder of 193.
The next digit of our result is 0. 
Result so far: 12650.0
Subtracting 0 from 193 leaves us with 193.
Take the next digit (1) from the dividend and append it to 193, then repeat: 1931 / 517

Step 8:
517 goes into 1931 3 times with a remainder of 380.
Put 3 as the next digit of the answer. 
Result so far: 126503.0
If we subtract 1551 from 1931, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Going ahead to step 9:
When dividing 3800 by 517, we get 7 with a remainder of 181.
Put 7 as the next digit of the answer. 
Result so far: 126503.7
If we take 3619 away from 3800, we end up with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Let's proceed to step 10:
If we divide 1810 by 517, we get 3 and a remainder of 259.
Use 3 as the next digit of our solution. 
Result so far: 126503.73
Subtracting 1551 from 1810 leaves us with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Step 11:
The number 517 fits into 2590 5 times, leaving a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 126503.735
Subtract 2585 from 2590 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 12:
517 goes into 50 0 times with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 126503.735
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 13:
517 can be fit into 500 0 times, resulting in a remainder of 500.
Write down 0 as next digit of the result. 
Result so far: 126503.735
If we take 0 away from 500, we end up with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

The final outcome is 126503.735, with a leftover of 0.0005.