Let's divide 81315801 by 12
The aim is to understand the frequency of 12 in 81315801.

On to step 1:
The number 12 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 12

Moving on to step 2:
The number 12 fits into 81 6 times, leaving a remainder of 9.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtracting 72 from 81 leaves us with 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 12

Moving on to step 3:
The number 12 fits into 93 7 times, leaving a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 67.0
Deduct 84 from 93 and we're left with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 12

Moving on to step 4:
91 divided by 12 is 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 677.0
Subtracting 84 from 91 leaves us with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 12

Let's proceed to step 5:
12 goes into 75 6 times with a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 6776.0
If we take 72 away from 75, we end up with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 12

Step 6:
12 can be fit into 38 3 times, resulting in a remainder of 2.
The next digit of our result is 3. 
Result so far: 67763.0
The remainder is 2 after subtracting 36 from 38.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 12

Let's proceed to step 7:
When dividing 20 by 12, we get 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 677631.0
If we take 12 away from 20, we end up with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 12

Advancing to step 8:
If we divide 81 by 12, we get 6 and a remainder of 9.
The number 6 becomes the next digit in our result. 
Result so far: 6776316.0
The remainder is 9 after subtracting 72 from 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
The number 12 fits into 90 7 times, leaving a remainder of 6.
The next digit of our result is 7. 
Result so far: 6776316.7
Deduct 84 from 90 and we're left 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 10:
12 can be fit into 60 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6776316.75
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.

Advancing to step 11:
When dividing 0 by 12, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6776316.75
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.

Let's proceed to step 12:
When dividing 0 by 12, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6776316.75
The remainder is 0 after subtracting 0 from 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 6776316.75 with a balance of 0.0.