We're dividing 811455 by 18 
The aim is to understand the frequency of 18 in 811455.

Step 1:
When dividing 8 by 18, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 18

Step 2:
18 can be fit into 81 4 times, resulting in a remainder of 9.
The next digit of our result is 4. 
Result so far: 4.0
If we take 72 away from 81, we end up with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 18

Advancing to step 3:
The number 18 fits into 91 5 times, leaving a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
If we take 90 away from 91, we end up with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 18

Step 4:
14 divided by 18 is 0 with a remainder of 14.
The next digit of our result is 0. 
Result so far: 450.0
The remainder is 14 after subtracting 0 from 14.
Grab the next digit (5) from the dividend, add it to 14, then carry on: 145 / 18

On to step 5:
When dividing 145 by 18, we get 8 with a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 4508.0
Subtracting 144 from 145 leaves us with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 18

Moving on to step 6:
If we divide 15 by 18, we get 0 and a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 45080.0
Subtract 0 from 15 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
18 goes into 150 8 times with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 45080.8
If we take 144 away from 150, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
18 can be fit into 60 3 times, resulting in a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 45080.83
Subtracting 54 from 60 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 9:
18 goes into 60 3 times with a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 45080.833
Subtracting 54 from 60 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 45080.833, with a leftover of 0.0006.