We look at the division of 715666 by 8 
The aim is to understand the frequency of 8 in 715666.

Going ahead to step 1:
8 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 8

Let's proceed to step 2:
8 can be fit into 71 8 times, resulting in a remainder of 7.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 64 from 71 leaves us with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 8

On to step 3:
The number 8 fits into 75 9 times, leaving a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 89.0
Deduct 72 from 75 and we're left with 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 8

Going ahead to step 4:
8 can be fit into 36 4 times, resulting in a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 894.0
If we take 32 away from 36, we end up with 4.
Include the next digit (6) from the dividend after 4, then repeat: 46 / 8

Let's proceed to step 5:
8 goes into 46 5 times with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 8945.0
If we subtract 40 from 46, we get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 8

Let's proceed to step 6:
8 can be fit into 66 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 89458.0
If we subtract 64 from 66, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
20 divided by 8 is 2 with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 89458.2
The remainder is 4 after subtracting 16 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
The number 8 fits into 40 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 89458.25
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 9:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 89458.25
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.

Step 10:
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: 89458.25
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.

The quotient of the division is 89458.25, and the remainder is 0.0.