We look at the division of 528007 by 28 
The aim is to understand the frequency of 28 in 528007.

Advancing to step 1:
When dividing 5 by 28, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 28

Going ahead to step 2:
52 divided by 28 is 1 with a remainder of 24.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 28 away from 52, we end up with 24.
Bring next digit (8) of the dividend behind the 24 and repeat the process: 248 / 28

Step 3:
If we divide 248 by 28, we get 8 and a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
If we subtract 224 from 248, we get 24.
Fetch the next digit (0) from the dividend, attach it to 24 and continue: 240 / 28

Let's proceed to step 4:
The number 28 fits into 240 8 times, leaving a remainder of 16.
The next digit of our result is 8. 
Result so far: 188.0
Subtracting 224 from 240 leaves us with 16.
Fetch the next digit (0) from the dividend, attach it to 16 and continue: 160 / 28

Moving on to step 5:
28 goes into 160 5 times with a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 1885.0
Subtracting 140 from 160 leaves us with 20.
Grab the next digit (7) from the dividend, add it to 20, then carry on: 207 / 28

Step 6:
28 can be fit into 207 7 times, resulting in a remainder of 11.
The next digit of our result is 7. 
Result so far: 18857.0
The remainder is 11 after subtracting 196 from 207.
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:
28 can be fit into 110 3 times, resulting in a remainder of 26.
Write down 3 as next digit of the result. 
Result so far: 18857.3
The remainder is 26 after subtracting 84 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 8:
28 can be fit into 260 9 times, resulting in a remainder of 8.
Record the quotient 9 as the next digit in the result. 
Result so far: 18857.39
Subtracting 252 from 260 leaves us 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.

Step 9:
28 goes into 80 2 times with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 18857.392
The remainder is 24 after subtracting 56 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 10:
240 divided by 28 is 8 with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 18857.3928
Subtract 224 from 240 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
28 can be fit into 160 5 times, resulting in a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 18857.39285
The remainder is 20 after subtracting 140 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 12:
When dividing 200 by 28, we get 7 with a remainder of 4.
The next digit of our result is 7. 
Result so far: 18857.392857
If we take 196 away from 200, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 13:
The number 28 fits into 40 1 times, leaving a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 18857.3928571
Deduct 28 from 40 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 14:
28 can be fit into 120 4 times, resulting in a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 18857.39285714
If we subtract 112 from 120, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 18857.39285714 and a remainder of 8e-09.