We look at the division of 810345 by 12 
The aim is to understand the frequency of 12 in 810345.

Step 1:
8 divided by 12 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 12

Moving on to step 2:
If we divide 81 by 12, we get 6 and a remainder of 9.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 72 from 81 and we're left with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 12

Step 3:
If we divide 90 by 12, we get 7 and a remainder of 6.
The next digit of our result is 7. 
Result so far: 67.0
If we subtract 84 from 90, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 12

Advancing to step 4:
When dividing 63 by 12, we get 5 with a remainder of 3.
The next digit of our result is 5. 
Result so far: 675.0
If we take 60 away from 63, we end up with 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 12

Let's proceed to step 5:
When dividing 34 by 12, we get 2 with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 6752.0
Subtract 24 from 34 to get 10.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 12

Step 6:
105 divided by 12 is 8 with a remainder of 9.
The next digit of our result is 8. 
Result so far: 67528.0
Subtract 96 from 105 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
90 divided by 12 is 7 with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 67528.7
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
If we divide 60 by 12, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 67528.75
Subtract 60 from 60 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.

Step 9:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 67528.75
Subtracting 0 from 0 leaves us 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.

On to step 10:
12 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 67528.75
Subtracting 0 from 0 leaves us 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.

In conclusion, the division gives 67528.75 with a balance of 0.0.