We look at the division of 144928 by 81 
The aim is to understand the frequency of 81 in 144928.

On to step 1:
The number 81 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 81

On to step 2:
81 can be fit into 14 0 times, resulting in a remainder of 14.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 14 after subtracting 0 from 14.
Take the next digit (4) from the dividend and append it to 14, then repeat: 144 / 81

Let's proceed to step 3:
If we divide 144 by 81, we get 1 and a remainder of 63.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 63 after subtracting 81 from 144.
Include the next digit (9) from the dividend after 63, then repeat: 639 / 81

On to step 4:
If we divide 639 by 81, we get 7 and a remainder of 72.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Subtract 567 from 639 to get 72.
Fetch the next digit (2) from the dividend, attach it to 72 and continue: 722 / 81

Advancing to step 5:
722 divided by 81 is 8 with a remainder of 74.
The number 8 becomes the next digit in our result. 
Result so far: 178.0
Subtract 648 from 722 to get 74.
Bring next digit (8) of the dividend behind the 74 and repeat the process: 748 / 81

Moving on to step 6:
748 divided by 81 is 9 with a remainder of 19.
The next digit of our result is 9. 
Result so far: 1789.0
If we subtract 729 from 748, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
81 goes into 190 2 times with a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 1789.2
Subtracting 162 from 190 leaves us 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.

Advancing to step 8:
81 goes into 280 3 times with a remainder of 37.
The next digit of our result is 3. 
Result so far: 1789.23
Subtract 243 from 280 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Advancing to step 9:
370 divided by 81 is 4 with a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 1789.234
Subtracting 324 from 370 leaves us 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.

On to step 10:
81 goes into 460 5 times with a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 1789.2345
The remainder is 55 after subtracting 405 from 460.
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 11:
81 can be fit into 550 6 times, resulting in a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 1789.23456
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.

Step 12:
640 divided by 81 is 7 with a remainder of 73.
Write down 7 as next digit of the result. 
Result so far: 1789.234567
Subtracting 567 from 640 leaves us 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 13:
81 goes into 730 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 1789.2345679
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.

Moving on to step 14:
The number 81 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 1789.2345679
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 1789.2345679 with a remaining 1e-08.