406902 ÷ 12 
The aim is to understand the frequency of 12 in 406902.

On to step 1:
If we divide 4 by 12, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 12

Advancing to step 2:
40 divided by 12 is 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 36 from 40 leaves us with 4.
Grab the next digit (6) from the dividend, add it to 4, then carry on: 46 / 12

Going ahead to step 3:
46 divided by 12 is 3 with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 33.0
Subtracting 36 from 46 leaves us with 10.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 12

Step 4:
12 can be fit into 109 9 times, resulting in a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 339.0
Subtract 108 from 109 to get 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 12

Let's proceed to step 5:
12 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 3390.0
Subtracting 0 from 10 leaves us with 10.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 12

On to step 6:
12 goes into 102 8 times with a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 33908.0
If we subtract 96 from 102, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
The number 12 fits into 60 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 33908.5
If we subtract 60 from 60, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 33908.5
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.

Let's proceed to step 9:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 33908.5
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.

The final outcome is 33908.5, with a leftover of 0.0.