We divide 990863 by 18
The aim is to understand the frequency of 18 in 990863.

Step 1:
9 divided by 18 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 18

Step 2:
18 goes into 99 5 times with a remainder of 9.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we take 90 away from 99, we end up with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 18

Step 3:
If we divide 90 by 18, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 55.0
If we take 90 away from 90, we end up with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 18

On to step 4:
If we divide 8 by 18, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 550.0
If we subtract 0 from 8, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 18

Let's proceed to step 5:
When dividing 86 by 18, we get 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 5504.0
If we take 72 away from 86, we end up with 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 18

Step 6:
If we divide 143 by 18, we get 7 and a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 55047.0
If we subtract 126 from 143, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 7:
18 can be fit into 170 9 times, resulting in a remainder of 8.
The next digit of our result is 9. 
Result so far: 55047.9
If we take 162 away from 170, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 8:
When dividing 80 by 18, we get 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 55047.94
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
80 divided by 18 is 4 with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 55047.944
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 55047.944, and the remainder is 0.0008.