We look at the division of 864323 by 12 
The aim is to understand the frequency of 12 in 864323.

On to step 1:
When dividing 8 by 12, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 12

Moving on to step 2:
When dividing 86 by 12, we get 7 with a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 84 from 86 and we're left with 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 12

Moving on to step 3:
The number 12 fits into 24 2 times, leaving a remainder of 0.
The next digit of our result is 2. 
Result so far: 72.0
Deduct 24 from 24 and we're left with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 12

Let's proceed to step 4:
When dividing 3 by 12, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 720.0
If we take 0 away from 3, we end up with 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 12

Let's proceed to step 5:
12 goes into 32 2 times with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 7202.0
Deduct 24 from 32 and we're left with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 12

Moving on to step 6:
The number 12 fits into 83 6 times, leaving a remainder of 11.
Record the quotient 6 as the next digit in the result. 
Result so far: 72026.0
Subtract 72 from 83 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
12 goes into 110 9 times with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 72026.9
Deduct 108 from 110 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
When dividing 20 by 12, we get 1 with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 72026.91
Subtract 12 from 20 to 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.

On to step 9:
When dividing 80 by 12, we get 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 72026.916
Subtracting 72 from 80 leaves us 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.

Going ahead to step 10:
80 divided by 12 is 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 72026.9166
Subtract 72 from 80 to 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.

After the division, we end up with 72026.9166 and a remainder of 8e-05.