We look at the division of 413144 by 12 
The aim is to understand the frequency of 12 in 413144.

On to step 1:
The number 12 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 12

Step 2:
The number 12 fits into 41 3 times, leaving a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 36 from 41 and we're left with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 12

Advancing to step 3:
12 goes into 53 4 times with a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 34.0
Deduct 48 from 53 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 12

Going ahead to step 4:
51 divided by 12 is 4 with a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 344.0
Subtract 48 from 51 to get 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 12

Step 5:
If we divide 34 by 12, we get 2 and a remainder of 10.
The next digit of our result is 2. 
Result so far: 3442.0
If we subtract 24 from 34, we get 10.
Bring next digit (4) of the dividend behind the 10 and repeat the process: 104 / 12

Step 6:
When dividing 104 by 12, we get 8 with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 34428.0
The remainder is 8 after subtracting 96 from 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
When dividing 80 by 12, we get 6 with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 34428.6
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 8:
When dividing 80 by 12, we get 6 with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 34428.66
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 34428.66 with a remaining 0.008.