Let's divide 15507 by 18
The aim is to understand the frequency of 18 in 15507.

Advancing to step 1:
If we divide 1 by 18, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 18

Step 2:
The number 18 fits into 15 0 times, leaving a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Append the next digit (5) from the dividend to 15 and continue with: 155 / 18

Advancing to step 3:
155 divided by 18 is 8 with a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 144 from 155 and we're left with 11.
Include the next digit (0) from the dividend after 11, then repeat: 110 / 18

Advancing to step 4:
18 can be fit into 110 6 times, resulting in a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 86.0
Deduct 108 from 110 and we're left with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 18

Going ahead to step 5:
The number 18 fits into 27 1 times, leaving a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 861.0
If we subtract 18 from 27, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 6:
18 goes into 90 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 861.5
Deduct 90 from 90 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
When dividing 0 by 18, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 861.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
The number 18 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 861.5
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 861.5 with a remaining 0.0.