We look at the division of 382889 by 81 
The aim is to understand the frequency of 81 in 382889.

Step 1:
81 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 81

Let's proceed to step 2:
The number 81 fits into 38 0 times, leaving a remainder of 38.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 38 after subtracting 0 from 38.
Grab the next digit (2) from the dividend, add it to 38, then carry on: 382 / 81

Step 3:
382 divided by 81 is 4 with a remainder of 58.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 58 after subtracting 324 from 382.
Grab the next digit (8) from the dividend, add it to 58, then carry on: 588 / 81

Let's proceed to step 4:
81 goes into 588 7 times with a remainder of 21.
The next digit of our result is 7. 
Result so far: 47.0
The remainder is 21 after subtracting 567 from 588.
Grab the next digit (8) from the dividend, add it to 21, then carry on: 218 / 81

Let's proceed to step 5:
The number 81 fits into 218 2 times, leaving a remainder of 56.
Put 2 as the next digit of the answer. 
Result so far: 472.0
The remainder is 56 after subtracting 162 from 218.
Bring next digit (9) of the dividend behind the 56 and repeat the process: 569 / 81

On to step 6:
The number 81 fits into 569 7 times, leaving a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 4727.0
The remainder is 2 after subtracting 567 from 569.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
The number 81 fits into 20 0 times, leaving a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 4727.0
If we take 0 away from 20, we end up 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.

Step 8:
81 can be fit into 200 2 times, resulting in a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 4727.02
Subtracting 162 from 200 leaves us 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.

Step 9:
The number 81 fits into 380 4 times, leaving a remainder of 56.
Put 4 as the next digit of the answer. 
Result so far: 4727.024
Subtracting 324 from 380 leaves us 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.

Moving on to step 10:
When dividing 560 by 81, we get 6 with a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 4727.0246
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.

Step 11:
When dividing 740 by 81, we get 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 4727.02469
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.

Going ahead to step 12:
81 can be fit into 110 1 times, resulting in a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 4727.024691
Deduct 81 from 110 and we're left 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.

Let's proceed to step 13:
290 divided by 81 is 3 with a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 4727.0246913
Subtract 243 from 290 to 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.

Step 14:
81 goes into 470 5 times with a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 4727.02469135
If we subtract 405 from 470, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The final outcome is 4727.02469135, with a leftover of 6.5e-08.