390492 divided by 30 
The aim is to understand the frequency of 30 in 390492.

Step 1:
If we divide 3 by 30, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 30

On to step 2:
39 divided by 30 is 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 30 from 39, we get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 30

Let's proceed to step 3:
When dividing 90 by 30, we get 3 with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 90 from 90, we get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 30

Step 4:
If we divide 4 by 30, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 130.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 30

Let's proceed to step 5:
30 goes into 49 1 times with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1301.0
Deduct 30 from 49 and we're left with 19.
Fetch the next digit (2) from the dividend, attach it to 19 and continue: 192 / 30

Going ahead to step 6:
If we divide 192 by 30, we get 6 and a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 13016.0
If we subtract 180 from 192, we get 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 7:
When dividing 120 by 30, we get 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 13016.4
If we take 120 away from 120, 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.

On to step 8:
30 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 13016.4
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:
0 divided by 30 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 13016.4
The remainder is 0 after subtracting 0 from 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 13016.4 with a balance of 0.0.