402649 ÷ 18 
The aim is to understand the frequency of 18 in 402649.

Moving on to step 1:
18 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 18

On to step 2:
18 goes into 40 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 36 from 40 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 18

Let's proceed to step 3:
If we divide 42 by 18, we get 2 and a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 22.0
The remainder is 6 after subtracting 36 from 42.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 18

Let's proceed to step 4:
The number 18 fits into 66 3 times, leaving a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 223.0
The remainder is 12 after subtracting 54 from 66.
Bring next digit (4) of the dividend behind the 12 and repeat the process: 124 / 18

Advancing to step 5:
18 can be fit into 124 6 times, resulting in a remainder of 16.
The next digit of our result is 6. 
Result so far: 2236.0
Deduct 108 from 124 and we're left with 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 18

Advancing to step 6:
169 divided by 18 is 9 with a remainder of 7.
Write down 9 as next digit of the result. 
Result so far: 22369.0
If we take 162 away from 169, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
When dividing 70 by 18, we get 3 with a remainder of 16.
Record the quotient 3 as the next digit in the result. 
Result so far: 22369.3
If we take 54 away from 70, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 8:
160 divided by 18 is 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 22369.38
Subtracting 144 from 160 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
When dividing 160 by 18, we get 8 with a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 22369.388
If we take 144 away from 160, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

In conclusion, the division gives 22369.388 with a balance of 0.0016.