Let's divide 439989 by 8
The aim is to understand the frequency of 8 in 439989.

Step 1:
4 divided by 8 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 8

Advancing to step 2:
8 goes into 43 5 times with a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we subtract 40 from 43, we get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 8

Going ahead to step 3:
8 can be fit into 39 4 times, resulting in a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 54.0
Deduct 32 from 39 and we're left with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 8

Moving on to step 4:
The number 8 fits into 79 9 times, leaving a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 549.0
Subtracting 72 from 79 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 8

Let's proceed to step 5:
The number 8 fits into 78 9 times, leaving a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 5499.0
The remainder is 6 after subtracting 72 from 78.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 8

Going ahead to step 6:
8 goes into 69 8 times with a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 54998.0
Deduct 64 from 69 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
The number 8 fits into 50 6 times, leaving a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 54998.6
If we take 48 away from 50, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
20 divided by 8 is 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 54998.62
If we subtract 16 from 20, 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.

Moving on to step 9:
The number 8 fits into 40 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 54998.625
Subtract 40 from 40 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.

Advancing to step 10:
If we divide 0 by 8, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 54998.625
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 11:
The number 8 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 54998.625
If we take 0 away from 0, we end up 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.

The final result is 54998.625 with a remainder of 0.0.