We look at the division of 909848 by 18 
The aim is to understand the frequency of 18 in 909848.

Going ahead to step 1:
18 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 18

Let's proceed to step 2:
When dividing 90 by 18, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 90 from 90, we get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 18

On to step 3:
18 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 50.0
If we take 0 away from 9, we end up with 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 18

On to step 4:
98 divided by 18 is 5 with a remainder of 8.
Record the quotient 5 as the next digit in the result. 
Result so far: 505.0
Subtracting 90 from 98 leaves us with 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 18

Advancing to step 5:
84 divided by 18 is 4 with a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 5054.0
If we take 72 away from 84, we end up with 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 18

Moving on to step 6:
When dividing 128 by 18, we get 7 with a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 50547.0
Deduct 126 from 128 and we're left 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.

Going ahead to step 7:
When dividing 20 by 18, we get 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 50547.1
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
If we divide 20 by 18, we get 1 and a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 50547.11
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 50547.11 with a remainder of 0.002.