564023 ÷ 81 
The aim is to understand the frequency of 81 in 564023.

Advancing to step 1:
The number 81 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 81

Let's proceed to step 2:
81 can be fit into 56 0 times, resulting in a remainder of 56.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 56 leaves us with 56.
Bring next digit (4) of the dividend behind the 56 and repeat the process: 564 / 81

Moving on to step 3:
When dividing 564 by 81, we get 6 with a remainder of 78.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 78 after subtracting 486 from 564.
Take the next digit (0) from the dividend and append it to 78, then repeat: 780 / 81

Moving on to step 4:
If we divide 780 by 81, we get 9 and a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 69.0
Subtracting 729 from 780 leaves us with 51.
Append the next digit (2) from the dividend to 51 and continue with: 512 / 81

Going ahead to step 5:
512 divided by 81 is 6 with a remainder of 26.
The number 6 becomes the next digit in our result. 
Result so far: 696.0
If we subtract 486 from 512, we get 26.
Include the next digit (3) from the dividend after 26, then repeat: 263 / 81

Let's proceed to step 6:
When dividing 263 by 81, we get 3 with a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 6963.0
Subtracting 243 from 263 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 7:
81 goes into 200 2 times with a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 6963.2
Deduct 162 from 200 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 8:
The number 81 fits into 380 4 times, leaving a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 6963.24
Deduct 324 from 380 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 9:
If we divide 560 by 81, we get 6 and a remainder of 74.
The next digit of our result is 6. 
Result so far: 6963.246
The remainder is 74 after subtracting 486 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 10:
When dividing 740 by 81, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 6963.2469
Deduct 729 from 740 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 11:
81 goes into 110 1 times with a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 6963.24691
Subtracting 81 from 110 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 12:
When dividing 290 by 81, we get 3 with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 6963.246913
If we subtract 243 from 290, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 13:
81 can be fit into 470 5 times, resulting in a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 6963.2469135
If we take 405 away from 470, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 14:
If we divide 650 by 81, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 6963.24691358
Deduct 648 from 650 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.

Our division results in 6963.24691358 with a remaining 2e-09.