Let's divide 533381 by 18
The aim is to understand the frequency of 18 in 533381.

Going ahead to step 1:
18 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 18

Step 2:
The number 18 fits into 53 2 times, leaving a remainder of 17.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 17 after subtracting 36 from 53.
Take the next digit (3) from the dividend and append it to 17, then repeat: 173 / 18

Let's proceed to step 3:
If we divide 173 by 18, we get 9 and a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 29.0
Deduct 162 from 173 and we're left with 11.
Include the next digit (3) from the dividend after 11, then repeat: 113 / 18

Let's proceed to step 4:
The number 18 fits into 113 6 times, leaving a remainder of 5.
The next digit of our result is 6. 
Result so far: 296.0
Deduct 108 from 113 and we're left with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 18

On to step 5:
58 divided by 18 is 3 with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 2963.0
If we subtract 54 from 58, we get 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 18

Moving on to step 6:
18 goes into 41 2 times with a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 29632.0
If we subtract 36 from 41, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
18 goes into 50 2 times with a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 29632.2
The remainder is 14 after subtracting 36 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 8:
18 can be fit into 140 7 times, resulting in a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 29632.27
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 9:
140 divided by 18 is 7 with a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 29632.277
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 29632.277 with a remainder of 0.0014.