Let's divide 521552 by 28
The aim is to understand the frequency of 28 in 521552.

Step 1:
5 divided by 28 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 28

Going ahead to step 2:
28 goes into 52 1 times with a remainder of 24.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 28 from 52 leaves us with 24.
Grab the next digit (1) from the dividend, add it to 24, then carry on: 241 / 28

Moving on to step 3:
The number 28 fits into 241 8 times, leaving a remainder of 17.
The next digit of our result is 8. 
Result so far: 18.0
Subtracting 224 from 241 leaves us with 17.
Bring next digit (5) of the dividend behind the 17 and repeat the process: 175 / 28

Advancing to step 4:
175 divided by 28 is 6 with a remainder of 7.
The number 6 becomes the next digit in our result. 
Result so far: 186.0
Subtract 168 from 175 to get 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 28

Advancing to step 5:
If we divide 75 by 28, we get 2 and a remainder of 19.
Record the quotient 2 as the next digit in the result. 
Result so far: 1862.0
Subtract 56 from 75 to get 19.
Fetch the next digit (2) from the dividend, attach it to 19 and continue: 192 / 28

Step 6:
If we divide 192 by 28, we get 6 and a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 18626.0
If we take 168 away from 192, 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.

Going ahead to step 7:
28 can be fit into 240 8 times, resulting in a remainder of 16.
The next digit of our result is 8. 
Result so far: 18626.8
Subtracting 224 from 240 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 8:
If we divide 160 by 28, we get 5 and a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 18626.85
Subtract 140 from 160 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 9:
28 can be fit into 200 7 times, resulting in a remainder of 4.
The next digit of our result is 7. 
Result so far: 18626.857
If we subtract 196 from 200, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
28 can be fit into 40 1 times, resulting in a remainder of 12.
The next digit of our result is 1. 
Result so far: 18626.8571
If we subtract 28 from 40, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 11:
28 goes into 120 4 times with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 18626.85714
If we take 112 away from 120, 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.

On to step 12:
28 goes into 80 2 times with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 18626.857142
If we take 56 away from 80, 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.

Let's proceed to step 13:
28 can be fit into 240 8 times, resulting in a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 18626.8571428
Subtracting 224 from 240 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 14:
28 goes into 160 5 times with a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 18626.85714285
If we take 140 away from 160, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 18626.85714285 with a balance of 2e-08.