Let's divide 845427 by 18
The aim is to understand the frequency of 18 in 845427.

Step 1:
The number 18 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 18

Going ahead to step 2:
The number 18 fits into 84 4 times, leaving a remainder of 12.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 72 from 84 leaves us with 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 18

Step 3:
18 can be fit into 125 6 times, resulting in a remainder of 17.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
Deduct 108 from 125 and we're left with 17.
Take the next digit (4) from the dividend and append it to 17, then repeat: 174 / 18

Moving on to step 4:
18 goes into 174 9 times with a remainder of 12.
Use 9 as the next digit of our solution. 
Result so far: 469.0
If we take 162 away from 174, we end up with 12.
Include the next digit (2) from the dividend after 12, then repeat: 122 / 18

On to step 5:
The number 18 fits into 122 6 times, leaving a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 4696.0
Subtracting 108 from 122 leaves us with 14.
Include the next digit (7) from the dividend after 14, then repeat: 147 / 18

Going ahead to step 6:
The number 18 fits into 147 8 times, leaving a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 46968.0
Subtract 144 from 147 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
The number 18 fits into 30 1 times, leaving a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 46968.1
If we subtract 18 from 30, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 8:
18 can be fit into 120 6 times, resulting in a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 46968.16
Subtract 108 from 120 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
When dividing 120 by 18, we get 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 46968.166
Subtracting 108 from 120 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 46968.166 with a remainder of 0.0012.