We're dividing 615549 by 18 
The aim is to understand the frequency of 18 in 615549.

Step 1:
18 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 18

Advancing to step 2:
When dividing 61 by 18, we get 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 54 from 61 and we're left with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 18

Advancing to step 3:
When dividing 75 by 18, we get 4 with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 34.0
Subtract 72 from 75 to get 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 18

Advancing to step 4:
When dividing 35 by 18, we get 1 with a remainder of 17.
Put 1 as the next digit of the answer. 
Result so far: 341.0
If we subtract 18 from 35, we get 17.
Fetch the next digit (4) from the dividend, attach it to 17 and continue: 174 / 18

Advancing to step 5:
If we divide 174 by 18, we get 9 and a remainder of 12.
The next digit of our result is 9. 
Result so far: 3419.0
If we subtract 162 from 174, we get 12.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 18

Advancing to step 6:
18 can be fit into 129 7 times, resulting in a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 34197.0
If we subtract 126 from 129, 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.

On to step 7:
18 can be fit into 30 1 times, resulting in a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 34197.1
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.

On to step 8:
18 goes into 120 6 times with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 34197.16
If we subtract 108 from 120, 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.

Moving on to step 9:
When dividing 120 by 18, we get 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 34197.166
If we subtract 108 from 120, 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.

Our division results in 34197.166 with a remaining 0.0012.