61313 ÷ 81 
The aim is to understand the frequency of 81 in 61313.

Going ahead to step 1:
When dividing 6 by 81, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 81

Advancing to step 2:
81 goes into 61 0 times with a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 61 to get 61.
Take the next digit (3) from the dividend and append it to 61, then repeat: 613 / 81

Advancing to step 3:
If we divide 613 by 81, we get 7 and a remainder of 46.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 567 from 613 and we're left with 46.
Append the next digit (1) from the dividend to 46 and continue with: 461 / 81

Step 4:
81 can be fit into 461 5 times, resulting in a remainder of 56.
The number 5 becomes the next digit in our result. 
Result so far: 75.0
Subtract 405 from 461 to get 56.
Bring next digit (3) of the dividend behind the 56 and repeat the process: 563 / 81

Moving on to step 5:
81 goes into 563 6 times with a remainder of 77.
The next digit of our result is 6. 
Result so far: 756.0
Subtracting 486 from 563 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 6:
The number 81 fits into 770 9 times, leaving a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 756.9
If we subtract 729 from 770, we get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 7:
The number 81 fits into 410 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 756.95
If we take 405 away from 410, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
When dividing 50 by 81, we get 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 756.95
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 9:
81 can be fit into 500 6 times, resulting in a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 756.9506
The remainder is 14 after subtracting 486 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 10:
When dividing 140 by 81, we get 1 with a remainder of 59.
The next digit of our result is 1. 
Result so far: 756.95061
Subtract 81 from 140 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 11:
The number 81 fits into 590 7 times, leaving a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 756.950617
Subtract 567 from 590 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 12:
When dividing 230 by 81, we get 2 with a remainder of 68.
Put 2 as the next digit of the answer. 
Result so far: 756.9506172
The remainder is 68 after subtracting 162 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 13:
When dividing 680 by 81, we get 8 with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 756.95061728
Subtract 648 from 680 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 756.95061728, with a leftover of 3.2e-08.