We're dividing 9990 by 4 
The aim is to understand the frequency of 4 in 9990.

Let's proceed to step 1:
If we divide 9 by 4, we get 2 and a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 1 after subtracting 8 from 9.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 4

Step 2:
4 goes into 19 4 times with a remainder of 3.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Subtracting 16 from 19 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 4

Moving on to step 3:
When dividing 39 by 4, we get 9 with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 249.0
Subtract 36 from 39 to get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 4

Step 4:
30 divided by 4 is 7 with a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 2497.0
The remainder is 2 after subtracting 28 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 5:
4 can be fit into 20 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 2497.5
Subtract 20 from 20 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.

On to step 6:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2497.5
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.

Advancing to step 7:
4 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 2497.5
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.

In conclusion, the division gives 2497.5 with a balance of 0.0.