We're dividing 335992 by 12 
The aim is to understand the frequency of 12 in 335992.

Step 1:
If we divide 3 by 12, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 12

On to step 2:
If we divide 33 by 12, we get 2 and a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 24 from 33 to get 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 12

Step 3:
95 divided by 12 is 7 with a remainder of 11.
Use 7 as the next digit of our solution. 
Result so far: 27.0
If we take 84 away from 95, we end up with 11.
Fetch the next digit (9) from the dividend, attach it to 11 and continue: 119 / 12

Going ahead to step 4:
119 divided by 12 is 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 279.0
Subtracting 108 from 119 leaves us with 11.
Bring next digit (9) of the dividend behind the 11 and repeat the process: 119 / 12

Step 5:
When dividing 119 by 12, we get 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 2799.0
Subtract 108 from 119 to get 11.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 12

On to step 6:
12 goes into 112 9 times with a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 27999.0
Subtract 108 from 112 to 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 7:
If we divide 40 by 12, we get 3 and a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 27999.3
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.

Step 8:
The number 12 fits into 40 3 times, leaving a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 27999.33
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 27999.33, with a leftover of 0.004.