We look at the division of 308392 by 12 
The aim is to understand the frequency of 12 in 308392.

Advancing to step 1:
The number 12 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 12

Going ahead to step 2:
When dividing 30 by 12, we get 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 24 from 30 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 12

Step 3:
12 can be fit into 68 5 times, resulting in a remainder of 8.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
The remainder is 8 after subtracting 60 from 68.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 12

Moving on to step 4:
When dividing 83 by 12, we get 6 with a remainder of 11.
Record the quotient 6 as the next digit in the result. 
Result so far: 256.0
Subtract 72 from 83 to get 11.
Grab the next digit (9) from the dividend, add it to 11, then carry on: 119 / 12

Let's proceed to step 5:
12 goes into 119 9 times with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 2569.0
Subtract 108 from 119 to get 11.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 12

Moving on to step 6:
12 goes into 112 9 times with a remainder of 4.
The next digit of our result is 9. 
Result so far: 25699.0
Subtracting 108 from 112 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.

Advancing to step 7:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 25699.3
If we take 36 away from 40, 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.

Going ahead to step 8:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 25699.33
If we subtract 36 from 40, 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.

The final outcome is 25699.33, with a leftover of 0.004.