We're dividing 28398 by 8 
The aim is to understand the frequency of 8 in 28398.

Step 1:
8 goes into 2 0 times with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 8

On to step 2:
8 can be fit into 28 3 times, resulting in a remainder of 4.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 24 from 28 to get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 8

On to step 3:
43 divided by 8 is 5 with a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 35.0
The remainder is 3 after subtracting 40 from 43.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 8

Step 4:
If we divide 39 by 8, we get 4 and a remainder of 7.
The next digit of our result is 4. 
Result so far: 354.0
If we subtract 32 from 39, we get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 8

On to step 5:
The number 8 fits into 78 9 times, leaving a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 3549.0
Deduct 72 from 78 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 6:
When dividing 60 by 8, we get 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 3549.7
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.

Advancing to step 7:
The number 8 fits into 40 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 3549.75
The remainder is 0 after subtracting 40 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
0 divided by 8 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3549.75
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
If we divide 0 by 8, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3549.75
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 3549.75 with a remaining 0.0.