We look at the division of 979719 by 81 
The aim is to understand the frequency of 81 in 979719.

Let's proceed to step 1:
When dividing 9 by 81, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 81

On to step 2:
If we divide 97 by 81, we get 1 and a remainder of 16.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 16 after subtracting 81 from 97.
Bring next digit (9) of the dividend behind the 16 and repeat the process: 169 / 81

Going ahead to step 3:
If we divide 169 by 81, we get 2 and a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 162 from 169 and we're left with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 81

Step 4:
When dividing 77 by 81, we get 0 with a remainder of 77.
The next digit of our result is 0. 
Result so far: 120.0
The remainder is 77 after subtracting 0 from 77.
Append the next digit (1) from the dividend to 77 and continue with: 771 / 81

Advancing to step 5:
81 can be fit into 771 9 times, resulting in a remainder of 42.
Write down 9 as next digit of the result. 
Result so far: 1209.0
Deduct 729 from 771 and we're left with 42.
Grab the next digit (9) from the dividend, add it to 42, then carry on: 429 / 81

Advancing to step 6:
81 can be fit into 429 5 times, resulting in a remainder of 24.
The number 5 becomes the next digit in our result. 
Result so far: 12095.0
Subtracting 405 from 429 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 7:
If we divide 240 by 81, we get 2 and a remainder of 78.
Record the quotient 2 as the next digit in the result. 
Result so far: 12095.2
If we subtract 162 from 240, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 8:
If we divide 780 by 81, we get 9 and a remainder of 51.
The number 9 becomes the next digit in our result. 
Result so far: 12095.29
Deduct 729 from 780 and we're left with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 9:
510 divided by 81 is 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 12095.296
The remainder is 24 after subtracting 486 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 10:
81 can be fit into 240 2 times, resulting in a remainder of 78.
Put 2 as the next digit of the answer. 
Result so far: 12095.2962
The remainder is 78 after subtracting 162 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 11:
780 divided by 81 is 9 with a remainder of 51.
The next digit of our result is 9. 
Result so far: 12095.29629
Subtract 729 from 780 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 12:
The number 81 fits into 510 6 times, leaving a remainder of 24.
The next digit of our result is 6. 
Result so far: 12095.296296
The remainder is 24 after subtracting 486 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 13:
240 divided by 81 is 2 with a remainder of 78.
Use 2 as the next digit of our solution. 
Result so far: 12095.2962962
Subtract 162 from 240 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 14:
81 can be fit into 780 9 times, resulting in a remainder of 51.
Put 9 as the next digit of the answer. 
Result so far: 12095.29629629
Subtract 729 from 780 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

The final outcome is 12095.29629629, with a leftover of 5.1e-08.