390717 divided by 8 
The aim is to understand the frequency of 8 in 390717.

Advancing to step 1:
8 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 8

Let's proceed to step 2:
If we divide 39 by 8, we get 4 and a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 32 from 39 leaves us with 7.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 8

On to step 3:
8 can be fit into 70 8 times, resulting in a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 48.0
If we take 64 away from 70, we end up with 6.
Bring next digit (7) of the dividend behind the 6 and repeat the process: 67 / 8

On to step 4:
8 goes into 67 8 times with a remainder of 3.
The next digit of our result is 8. 
Result so far: 488.0
If we take 64 away from 67, we end up with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 8

Going ahead to step 5:
When dividing 31 by 8, we get 3 with a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 4883.0
The remainder is 7 after subtracting 24 from 31.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 8

Step 6:
8 goes into 77 9 times with a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 48839.0
Deduct 72 from 77 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:
When dividing 50 by 8, we get 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 48839.6
The remainder is 2 after subtracting 48 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
The number 8 fits into 20 2 times, leaving a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 48839.62
Subtracting 16 from 20 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.

On to step 9:
When dividing 40 by 8, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 48839.625
If we take 40 away from 40, 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.

On to step 10:
0 divided by 8 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 48839.625
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.

Going ahead to step 11:
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: 48839.625
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.

The final result is 48839.625 with a remainder of 0.0.