306981 divided by 18 
The aim is to understand the frequency of 18 in 306981.

Going ahead to step 1:
The number 18 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 18

Going ahead to step 2:
The number 18 fits into 30 1 times, leaving a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 18 from 30 to get 12.
Grab the next digit (6) from the dividend, add it to 12, then carry on: 126 / 18

Moving on to step 3:
If we divide 126 by 18, we get 7 and a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 17.0
If we take 126 away from 126, we end up with 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 18

Going ahead to step 4:
9 divided by 18 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 170.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 18

Step 5:
The number 18 fits into 98 5 times, leaving a remainder of 8.
The next digit of our result is 5. 
Result so far: 1705.0
Subtracting 90 from 98 leaves us with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 18

Moving on to step 6:
18 goes into 81 4 times with a remainder of 9.
The next digit of our result is 4. 
Result so far: 17054.0
If we subtract 72 from 81, 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.

Step 7:
When dividing 90 by 18, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 17054.5
Subtract 90 from 90 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
The number 18 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 17054.5
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.

Advancing to step 9:
The number 18 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 17054.5
Deduct 0 from 0 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.

In conclusion, the division gives 17054.5 with a balance of 0.0.