Let's divide 908021 by 18
The aim is to understand the frequency of 18 in 908021.

Let's proceed to step 1:
The number 18 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 18

Going ahead to step 2:
18 goes into 90 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 90 from 90 to get 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 18

On to step 3:
18 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 50.0
If we subtract 0 from 8, we get 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 18

Advancing to step 4:
When dividing 80 by 18, we get 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 504.0
Deduct 72 from 80 and we're left with 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 18

Advancing to step 5:
82 divided by 18 is 4 with a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 5044.0
Subtract 72 from 82 to get 10.
Include the next digit (1) from the dividend after 10, then repeat: 101 / 18

Advancing to step 6:
18 can be fit into 101 5 times, resulting in a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 50445.0
The remainder is 11 after subtracting 90 from 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 7:
If we divide 110 by 18, we get 6 and a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 50445.6
If we subtract 108 from 110, 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.

On to step 8:
If we divide 20 by 18, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 50445.61
If we subtract 18 from 20, 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 9:
When dividing 20 by 18, we get 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 50445.611
Subtract 18 from 20 to 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.

After the division, we end up with 50445.611 and a remainder of 0.0002.