We look at the division of 807451 by 28 
The aim is to understand the frequency of 28 in 807451.

Step 1:
If we divide 8 by 28, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 28

Going ahead to step 2:
The number 28 fits into 80 2 times, leaving a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 56 from 80, we get 24.
Include the next digit (7) from the dividend after 24, then repeat: 247 / 28

On to step 3:
28 can be fit into 247 8 times, resulting in a remainder of 23.
The next digit of our result is 8. 
Result so far: 28.0
Deduct 224 from 247 and we're left with 23.
Include the next digit (4) from the dividend after 23, then repeat: 234 / 28

Moving on to step 4:
If we divide 234 by 28, we get 8 and a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 288.0
If we subtract 224 from 234, we get 10.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 28

Advancing to step 5:
28 can be fit into 105 3 times, resulting in a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 2883.0
The remainder is 21 after subtracting 84 from 105.
Take the next digit (1) from the dividend and append it to 21, then repeat: 211 / 28

On to step 6:
28 can be fit into 211 7 times, resulting in a remainder of 15.
The number 7 becomes the next digit in our result. 
Result so far: 28837.0
Deduct 196 from 211 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 7:
When dividing 150 by 28, we get 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 28837.5
Subtract 140 from 150 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
If we divide 100 by 28, we get 3 and a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 28837.53
Subtract 84 from 100 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.

On to step 9:
The number 28 fits into 160 5 times, leaving a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 28837.535
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.

Going ahead to step 10:
If we divide 200 by 28, we get 7 and a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 28837.5357
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 11:
When dividing 40 by 28, we get 1 with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 28837.53571
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.

Moving on to step 12:
28 can be fit into 120 4 times, resulting in a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 28837.535714
The remainder is 8 after subtracting 112 from 120.
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 13:
28 goes into 80 2 times with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 28837.5357142
Subtracting 56 from 80 leaves us 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 14:
When dividing 240 by 28, we get 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 28837.53571428
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.

In conclusion, the division gives 28837.53571428 with a balance of 1.6e-08.