520665 divided by 52 
The aim is to understand the frequency of 52 in 520665.

Advancing to step 1:
If we divide 5 by 52, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 52

On to step 2:
52 divided by 52 is 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 52 away from 52, we end up with 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 52

Going ahead to step 3:
The number 52 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 0 after subtracting 0 from 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 52

Moving on to step 4:
The number 52 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 52

Let's proceed to step 5:
If we divide 66 by 52, we get 1 and a remainder of 14.
The next digit of our result is 1. 
Result so far: 1001.0
If we take 52 away from 66, we end up with 14.
Grab the next digit (5) from the dividend, add it to 14, then carry on: 145 / 52

On to step 6:
52 can be fit into 145 2 times, resulting in a remainder of 41.
Use 2 as the next digit of our solution. 
Result so far: 10012.0
Subtract 104 from 145 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 7:
The number 52 fits into 410 7 times, leaving a remainder of 46.
Put 7 as the next digit of the answer. 
Result so far: 10012.7
If we subtract 364 from 410, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 8:
460 divided by 52 is 8 with a remainder of 44.
Use 8 as the next digit of our solution. 
Result so far: 10012.78
If we subtract 416 from 460, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 9:
The number 52 fits into 440 8 times, leaving a remainder of 24.
The next digit of our result is 8. 
Result so far: 10012.788
If we take 416 away from 440, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The quotient of the division is 10012.788, and the remainder is 0.0024.