We look at the division of 802939 by 18 
The aim is to understand the frequency of 18 in 802939.

Going ahead to step 1:
When dividing 8 by 18, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 18

Step 2:
18 goes into 80 4 times with a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 72 from 80 to get 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 18

Let's proceed to step 3:
If we divide 82 by 18, we get 4 and a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 44.0
The remainder is 10 after subtracting 72 from 82.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 18

Going ahead to step 4:
The number 18 fits into 109 6 times, leaving a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 446.0
Subtract 108 from 109 to get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 18

Advancing to step 5:
18 goes into 13 0 times with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 4460.0
Deduct 0 from 13 and we're left with 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 18

On to step 6:
139 divided by 18 is 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 44607.0
The remainder is 13 after subtracting 126 from 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 7:
If we divide 130 by 18, we get 7 and a remainder of 4.
The next digit of our result is 7. 
Result so far: 44607.7
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
When dividing 40 by 18, we get 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 44607.72
Subtracting 36 from 40 leaves us 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:
If we divide 40 by 18, we get 2 and a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 44607.722
Subtracting 36 from 40 leaves us 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.

The final result is 44607.722 with a remainder of 0.0004.