31184947 ÷ 81 
The aim is to understand the frequency of 81 in 31184947.

Let's proceed to step 1:
When dividing 3 by 81, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 81

Going ahead to step 2:
When dividing 31 by 81, we get 0 with a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Fetch the next digit (1) from the dividend, attach it to 31 and continue: 311 / 81

Let's proceed to step 3:
81 goes into 311 3 times with a remainder of 68.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 243 from 311 and we're left with 68.
Include the next digit (8) from the dividend after 68, then repeat: 688 / 81

Advancing to step 4:
When dividing 688 by 81, we get 8 with a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Subtract 648 from 688 to get 40.
Take the next digit (4) from the dividend and append it to 40, then repeat: 404 / 81

Step 5:
The number 81 fits into 404 4 times, leaving a remainder of 80.
The next digit of our result is 4. 
Result so far: 384.0
Subtract 324 from 404 to get 80.
Grab the next digit (9) from the dividend, add it to 80, then carry on: 809 / 81

On to step 6:
When dividing 809 by 81, we get 9 with a remainder of 80.
The number 9 becomes the next digit in our result. 
Result so far: 3849.0
If we take 729 away from 809, we end up with 80.
Include the next digit (4) from the dividend after 80, then repeat: 804 / 81

Moving on to step 7:
The number 81 fits into 804 9 times, leaving a remainder of 75.
The next digit of our result is 9. 
Result so far: 38499.0
Deduct 729 from 804 and we're left with 75.
Take the next digit (7) from the dividend and append it to 75, then repeat: 757 / 81

On to step 8:
If we divide 757 by 81, we get 9 and a remainder of 28.
Put 9 as the next digit of the answer. 
Result so far: 384999.0
Deduct 729 from 757 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 9:
81 can be fit into 280 3 times, resulting in a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 384999.3
The remainder is 37 after subtracting 243 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 10:
When dividing 370 by 81, we get 4 with a remainder of 46.
Put 4 as the next digit of the answer. 
Result so far: 384999.34
If we take 324 away from 370, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 11:
When dividing 460 by 81, we get 5 with a remainder of 55.
Use 5 as the next digit of our solution. 
Result so far: 384999.345
Deduct 405 from 460 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Going ahead to step 12:
81 can be fit into 550 6 times, resulting in a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 384999.3456
Deduct 486 from 550 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 13:
640 divided by 81 is 7 with a remainder of 73.
Write down 7 as next digit of the result. 
Result so far: 384999.34567
Deduct 567 from 640 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 14:
81 goes into 730 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 384999.345679
Deduct 729 from 730 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 15:
81 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 384999.345679
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 16:
The number 81 fits into 100 1 times, leaving a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 384999.34567901
If we take 81 away from 100, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

In conclusion, the division gives 384999.34567901 with a balance of 1.9e-08.