We're dividing 427491 by 12 
The aim is to understand the frequency of 12 in 427491.

Step 1:
If we divide 4 by 12, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 12

Let's proceed to step 2:
If we divide 42 by 12, we get 3 and a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 36 from 42 and we're left with 6.
Fetch the next digit (7) from the dividend, attach it to 6 and continue: 67 / 12

Step 3:
If we divide 67 by 12, we get 5 and a remainder of 7.
Write down 5 as next digit of the result. 
Result so far: 35.0
If we subtract 60 from 67, we get 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 12

Advancing to step 4:
When dividing 74 by 12, we get 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 356.0
Subtract 72 from 74 to get 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 12

Let's proceed to step 5:
The number 12 fits into 29 2 times, leaving a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 3562.0
Deduct 24 from 29 and we're left with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 12

Advancing to step 6:
When dividing 51 by 12, we get 4 with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 35624.0
Subtracting 48 from 51 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
12 goes into 30 2 times with a remainder of 6.
The next digit of our result is 2. 
Result so far: 35624.2
If we subtract 24 from 30, 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 8:
60 divided by 12 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 35624.25
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.

Let's proceed to step 9:
12 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: 35624.25
Deduct 0 from 0 and we're left 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 10:
The number 12 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 35624.25
Subtract 0 from 0 to 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.

The quotient of the division is 35624.25, and the remainder is 0.0.