455151 ÷ 18 
The aim is to understand the frequency of 18 in 455151.

On to step 1:
18 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 18

Advancing to step 2:
The number 18 fits into 45 2 times, leaving a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 36 from 45 leaves us with 9.
Include the next digit (5) from the dividend after 9, then repeat: 95 / 18

Moving on to step 3:
95 divided by 18 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 25.0
The remainder is 5 after subtracting 90 from 95.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 18

Going ahead to step 4:
If we divide 51 by 18, we get 2 and a remainder of 15.
Use 2 as the next digit of our solution. 
Result so far: 252.0
Subtracting 36 from 51 leaves us with 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 18

Going ahead to step 5:
18 can be fit into 155 8 times, resulting in a remainder of 11.
Write down 8 as next digit of the result. 
Result so far: 2528.0
The remainder is 11 after subtracting 144 from 155.
Fetch the next digit (1) from the dividend, attach it to 11 and continue: 111 / 18

Let's proceed to step 6:
The number 18 fits into 111 6 times, leaving a remainder of 3.
The next digit of our result is 6. 
Result so far: 25286.0
If we subtract 108 from 111, we 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.

Going ahead to step 7:
30 divided by 18 is 1 with a remainder of 12.
The next digit of our result is 1. 
Result so far: 25286.1
If we take 18 away from 30, we end up 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.

Advancing 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: 25286.16
Deduct 108 from 120 and we're left 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.

Going ahead to step 9:
120 divided by 18 is 6 with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 25286.166
The remainder is 12 after subtracting 108 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 25286.166 with a remaining 0.0012.