We look at the division of 216769 by 18 
The aim is to understand the frequency of 18 in 216769.

On to step 1:
If we divide 2 by 18, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 18

Going ahead to step 2:
21 divided by 18 is 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 18 from 21 leaves us with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 18

On to step 3:
The number 18 fits into 36 2 times, leaving a remainder of 0.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 0 after subtracting 36 from 36.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 18

Advancing to step 4:
7 divided by 18 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 120.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 18

Step 5:
18 goes into 76 4 times with a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 1204.0
Subtract 72 from 76 to get 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 18

Step 6:
The number 18 fits into 49 2 times, leaving a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 12042.0
If we subtract 36 from 49, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
18 goes into 130 7 times with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 12042.7
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
If we divide 40 by 18, we get 2 and a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 12042.72
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
The number 18 fits into 40 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 12042.722
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

In conclusion, the division gives 12042.722 with a balance of 0.0004.