657424 ÷ 12 
The aim is to understand the frequency of 12 in 657424.

Step 1:
If we divide 6 by 12, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 12

Let's proceed to step 2:
65 divided by 12 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 5 after subtracting 60 from 65.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 12

Step 3:
12 goes into 57 4 times with a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 54.0
If we subtract 48 from 57, we get 9.
Include the next digit (4) from the dividend after 9, then repeat: 94 / 12

Moving on to step 4:
12 can be fit into 94 7 times, resulting in a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 547.0
Deduct 84 from 94 and we're left with 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 12

Going ahead to step 5:
When dividing 102 by 12, we get 8 with a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 5478.0
The remainder is 6 after subtracting 96 from 102.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 12

Moving on to step 6:
12 goes into 64 5 times with a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 54785.0
Subtracting 60 from 64 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:
When dividing 40 by 12, we get 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 54785.3
Subtracting 36 from 40 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.

On to step 8:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 54785.33
Subtracting 36 from 40 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.

After the division, we end up with 54785.33 and a remainder of 0.004.