995666 ÷ 4 
The aim is to understand the frequency of 4 in 995666.

Step 1:
9 divided by 4 is 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 1 after subtracting 8 from 9.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 4

Step 2:
4 can be fit into 19 4 times, resulting in a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 24.0
Deduct 16 from 19 and we're left with 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 4

On to step 3:
4 can be fit into 35 8 times, resulting in a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 248.0
The remainder is 3 after subtracting 32 from 35.
Grab the next digit (6) from the dividend, add it to 3, then carry on: 36 / 4

Step 4:
4 can be fit into 36 9 times, resulting in a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 2489.0
Subtract 36 from 36 to get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 4

On to step 5:
If we divide 6 by 4, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 24891.0
The remainder is 2 after subtracting 4 from 6.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 4

Advancing to step 6:
If we divide 26 by 4, we get 6 and a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 248916.0
If we take 24 away from 26, 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.

Step 7:
If we divide 20 by 4, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 248916.5
If we subtract 20 from 20, 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.

Let's proceed to step 8:
If we divide 0 by 4, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 248916.5
Subtracting 0 from 0 leaves us 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 9:
4 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 248916.5
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 248916.5 with a remainder of 0.0.