We're dividing 807991 by 28 
The aim is to understand the frequency of 28 in 807991.

On to step 1:
The number 28 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 28

Moving on to step 2:
80 divided by 28 is 2 with 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.
Take the next digit (7) from the dividend and append it to 24, then repeat: 247 / 28

Advancing to step 3:
The number 28 fits into 247 8 times, leaving a remainder of 23.
Put 8 as the next digit of the answer. 
Result so far: 28.0
Deduct 224 from 247 and we're left with 23.
Grab the next digit (9) from the dividend, add it to 23, then carry on: 239 / 28

Step 4:
28 can be fit into 239 8 times, resulting in a remainder of 15.
The number 8 becomes the next digit in our result. 
Result so far: 288.0
Subtract 224 from 239 to get 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 28

Going ahead to step 5:
28 can be fit into 159 5 times, resulting in a remainder of 19.
The number 5 becomes the next digit in our result. 
Result so far: 2885.0
If we subtract 140 from 159, we get 19.
Fetch the next digit (1) from the dividend, attach it to 19 and continue: 191 / 28

Advancing to step 6:
If we divide 191 by 28, we get 6 and a remainder of 23.
Put 6 as the next digit of the answer. 
Result so far: 28856.0
Deduct 168 from 191 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 7:
28 goes into 230 8 times with a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 28856.8
Subtract 224 from 230 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
When dividing 60 by 28, we get 2 with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 28856.82
Subtracting 56 from 60 leaves us 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.

Moving on to step 9:
28 goes into 40 1 times with a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 28856.821
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.

Let's proceed to step 10:
When dividing 120 by 28, we get 4 with a remainder of 8.
The next digit of our result is 4. 
Result so far: 28856.8214
Subtracting 112 from 120 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.

Let's proceed to step 11:
If we divide 80 by 28, we get 2 and a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 28856.82142
If we subtract 56 from 80, we get 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 12:
If we divide 240 by 28, we get 8 and a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 28856.821428
If we subtract 224 from 240, we 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.

Moving on to step 13:
28 goes into 160 5 times with a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 28856.8214285
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.

Step 14:
28 can be fit into 200 7 times, resulting in a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 28856.82142857
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.

The final result is 28856.82142857 with a remainder of 4e-09.