We look at the division of 518191 by 52 
The aim is to understand the frequency of 52 in 518191.

Let's proceed to step 1:
If we divide 5 by 52, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 52

Moving on to step 2:
The number 52 fits into 51 0 times, leaving a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Bring next digit (8) of the dividend behind the 51 and repeat the process: 518 / 52

Moving on to step 3:
52 can be fit into 518 9 times, resulting in a remainder of 50.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 468 from 518, we get 50.
Bring next digit (1) of the dividend behind the 50 and repeat the process: 501 / 52

Let's proceed to step 4:
The number 52 fits into 501 9 times, leaving a remainder of 33.
Record the quotient 9 as the next digit in the result. 
Result so far: 99.0
The remainder is 33 after subtracting 468 from 501.
Grab the next digit (9) from the dividend, add it to 33, then carry on: 339 / 52

On to step 5:
52 goes into 339 6 times with a remainder of 27.
Write down 6 as next digit of the result. 
Result so far: 996.0
Deduct 312 from 339 and we're left with 27.
Grab the next digit (1) from the dividend, add it to 27, then carry on: 271 / 52

Let's proceed to step 6:
The number 52 fits into 271 5 times, leaving a remainder of 11.
Record the quotient 5 as the next digit in the result. 
Result so far: 9965.0
Subtract 260 from 271 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
The number 52 fits into 110 2 times, leaving a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 9965.2
Subtracting 104 from 110 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 8:
52 can be fit into 60 1 times, resulting in a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 9965.21
If we take 52 away from 60, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
80 divided by 52 is 1 with a remainder of 28.
The next digit of our result is 1. 
Result so far: 9965.211
The remainder is 28 after subtracting 52 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The quotient of the division is 9965.211, and the remainder is 0.0028.