90830 ÷ 8 
The aim is to understand the frequency of 8 in 90830.

Step 1:
When dividing 9 by 8, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
If we take 8 away from 9, we end up with 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 8

On to step 2:
8 can be fit into 10 1 times, resulting in a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 11.0
If we subtract 8 from 10, we get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 8

On to step 3:
8 can be fit into 28 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 113.0
The remainder is 4 after subtracting 24 from 28.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 8

Advancing to step 4:
If we divide 43 by 8, we get 5 and a remainder of 3.
The next digit of our result is 5. 
Result so far: 1135.0
If we take 40 away from 43, we end up with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 8

Going ahead to step 5:
The number 8 fits into 30 3 times, leaving a remainder of 6.
The next digit of our result is 3. 
Result so far: 11353.0
Subtracting 24 from 30 leaves us 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.

Let's proceed to step 6:
The number 8 fits into 60 7 times, leaving a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 11353.7
If we subtract 56 from 60, 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.

Step 7:
40 divided by 8 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 11353.75
If we subtract 40 from 40, 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.

Moving on to step 8:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 11353.75
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
If we divide 0 by 8, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 11353.75
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.

Our division results in 11353.75 with a remaining 0.0.