We look at the division of 930830 by 81 
The aim is to understand the frequency of 81 in 930830.

Step 1:
The number 81 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 81

Going ahead to step 2:
When dividing 93 by 81, we get 1 with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 81 from 93 to get 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 81

Going ahead to step 3:
If we divide 120 by 81, we get 1 and a remainder of 39.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
The remainder is 39 after subtracting 81 from 120.
Fetch the next digit (8) from the dividend, attach it to 39 and continue: 398 / 81

Let's proceed to step 4:
81 can be fit into 398 4 times, resulting in a remainder of 74.
Put 4 as the next digit of the answer. 
Result so far: 114.0
Deduct 324 from 398 and we're left with 74.
Fetch the next digit (3) from the dividend, attach it to 74 and continue: 743 / 81

Step 5:
The number 81 fits into 743 9 times, leaving a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 1149.0
Subtract 729 from 743 to get 14.
Take the next digit (0) from the dividend and append it to 14, then repeat: 140 / 81

Advancing to step 6:
When dividing 140 by 81, we get 1 with a remainder of 59.
Write down 1 as next digit of the result. 
Result so far: 11491.0
If we subtract 81 from 140, we 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 7:
When dividing 590 by 81, we get 7 with a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 11491.7
The remainder is 23 after subtracting 567 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 8:
If we divide 230 by 81, we get 2 and a remainder of 68.
The next digit of our result is 2. 
Result so far: 11491.72
If we take 162 away from 230, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 9:
If we divide 680 by 81, we get 8 and a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 11491.728
If we take 648 away from 680, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 10:
320 divided by 81 is 3 with a remainder of 77.
Use 3 as the next digit of our solution. 
Result so far: 11491.7283
If we take 243 away from 320, we end up 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 11:
81 goes into 770 9 times with a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 11491.72839
Subtracting 729 from 770 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 12:
The number 81 fits into 410 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 11491.728395
Subtracting 405 from 410 leaves us 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.

On to step 13:
50 divided by 81 is 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 11491.728395
Subtract 0 from 50 to 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.

Advancing to step 14:
500 divided by 81 is 6 with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 11491.72839506
Subtracting 486 from 500 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 11491.72839506 with a balance of 1.4e-08.