We look at the division of 669934 by 12 
The aim is to understand the frequency of 12 in 669934.

Advancing to step 1:
If we divide 6 by 12, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 12

Step 2:
12 goes into 66 5 times with a remainder of 6.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 60 from 66 leaves us with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 12

Going ahead to step 3:
The number 12 fits into 69 5 times, leaving a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 55.0
If we subtract 60 from 69, we get 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 12

Step 4:
12 goes into 99 8 times with a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 558.0
If we subtract 96 from 99, we get 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 12

Moving on to step 5:
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: 5582.0
Subtracting 24 from 33 leaves us with 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 12

Moving on to step 6:
When dividing 94 by 12, we get 7 with a remainder of 10.
The number 7 becomes the next digit in our result. 
Result so far: 55827.0
Subtracting 84 from 94 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
If we divide 100 by 12, we get 8 and a remainder of 4.
The next digit of our result is 8. 
Result so far: 55827.8
Deduct 96 from 100 and we're left 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:
12 goes into 40 3 times with a remainder of 4.
The next digit of our result is 3. 
Result so far: 55827.83
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
40 divided by 12 is 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 55827.833
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 55827.833 and a remainder of 0.0004.