348339 divided by 18 
The aim is to understand the frequency of 18 in 348339.

Let's proceed to step 1:
3 divided by 18 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 18

On to step 2:
18 goes into 34 1 times with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 18 from 34 leaves us with 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 18

Advancing to step 3:
168 divided by 18 is 9 with a remainder of 6.
The next digit of our result is 9. 
Result so far: 19.0
If we subtract 162 from 168, we get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 18

Moving on to step 4:
63 divided by 18 is 3 with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 193.0
Deduct 54 from 63 and we're left with 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 18

Let's proceed to step 5:
93 divided by 18 is 5 with a remainder of 3.
The next digit of our result is 5. 
Result so far: 1935.0
Subtracting 90 from 93 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 18

Advancing to step 6:
The number 18 fits into 39 2 times, leaving a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 19352.0
If we take 36 away from 39, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
18 can be fit into 30 1 times, resulting in a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 19352.1
Deduct 18 from 30 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
18 goes into 120 6 times with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 19352.16
If we take 108 away from 120, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
When dividing 120 by 18, we get 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 19352.166
If we take 108 away from 120, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 19352.166 with a remainder of 0.0012.