We look at the division of 517775 by 53 
The aim is to understand the frequency of 53 in 517775.

Going ahead to step 1:
53 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 53

Advancing to step 2:
The number 53 fits into 51 0 times, leaving a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Take the next digit (7) from the dividend and append it to 51, then repeat: 517 / 53

On to step 3:
If we divide 517 by 53, we get 9 and a remainder of 40.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 477 from 517, we get 40.
Take the next digit (7) from the dividend and append it to 40, then repeat: 407 / 53

Advancing to step 4:
If we divide 407 by 53, we get 7 and a remainder of 36.
Record the quotient 7 as the next digit in the result. 
Result so far: 97.0
If we take 371 away from 407, we end up with 36.
Fetch the next digit (7) from the dividend, attach it to 36 and continue: 367 / 53

On to step 5:
53 goes into 367 6 times with a remainder of 49.
Write down 6 as next digit of the result. 
Result so far: 976.0
Subtracting 318 from 367 leaves us with 49.
Grab the next digit (5) from the dividend, add it to 49, then carry on: 495 / 53

Let's proceed to step 6:
The number 53 fits into 495 9 times, leaving a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 9769.0
If we take 477 away from 495, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
53 can be fit into 180 3 times, resulting in a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 9769.3
Subtracting 159 from 180 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 8:
53 goes into 210 3 times with a remainder of 51.
The number 3 becomes the next digit in our result. 
Result so far: 9769.33
The remainder is 51 after subtracting 159 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

The final outcome is 9769.33, with a leftover of 0.051.