We look at the division of 643263 by 8 
The aim is to understand the frequency of 8 in 643263.

On to step 1:
If we divide 6 by 8, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 8

Step 2:
8 can be fit into 64 8 times, resulting in a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 64 from 64 to get 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 8

Advancing to step 3:
If we divide 3 by 8, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 80.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 8

Moving on to step 4:
8 goes into 32 4 times with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 804.0
If we subtract 32 from 32, we get 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 8

Step 5:
8 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 8040.0
If we subtract 0 from 6, we get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 8

Step 6:
8 goes into 63 7 times with a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 80407.0
Subtract 56 from 63 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
When dividing 70 by 8, we get 8 with a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 80407.8
If we subtract 64 from 70, we 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.

Going ahead to step 8:
8 goes into 60 7 times with a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 80407.87
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.

Advancing to step 9:
If we divide 40 by 8, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 80407.875
Deduct 40 from 40 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.

Advancing to step 10:
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: 80407.875
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
8 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 80407.875
The remainder is 0 after subtracting 0 from 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 80407.875 with a remainder of 0.0.