We look at the division of 63067979 by 81 
The aim is to understand the frequency of 81 in 63067979.

Let's proceed to step 1:
If we divide 6 by 81, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 81

Moving on to step 2:
If we divide 63 by 81, we get 0 and a remainder of 63.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Append the next digit (0) from the dividend to 63 and continue with: 630 / 81

On to step 3:
If we divide 630 by 81, we get 7 and a remainder of 63.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 567 from 630 to get 63.
Grab the next digit (6) from the dividend, add it to 63, then carry on: 636 / 81

On to step 4:
81 goes into 636 7 times with a remainder of 69.
The next digit of our result is 7. 
Result so far: 77.0
Subtracting 567 from 636 leaves us with 69.
Append the next digit (7) from the dividend to 69 and continue with: 697 / 81

Moving on to step 5:
The number 81 fits into 697 8 times, leaving a remainder of 49.
Put 8 as the next digit of the answer. 
Result so far: 778.0
Subtracting 648 from 697 leaves us with 49.
Append the next digit (9) from the dividend to 49 and continue with: 499 / 81

Advancing to step 6:
81 goes into 499 6 times with a remainder of 13.
The next digit of our result is 6. 
Result so far: 7786.0
Deduct 486 from 499 and we're left with 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 81

Going ahead to step 7:
137 divided by 81 is 1 with a remainder of 56.
The next digit of our result is 1. 
Result so far: 77861.0
Deduct 81 from 137 and we're left with 56.
Include the next digit (9) from the dividend after 56, then repeat: 569 / 81

Going ahead to step 8:
81 can be fit into 569 7 times, resulting in a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 778617.0
Subtract 567 from 569 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
81 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 778617.0
Subtract 0 from 20 to get 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 10:
When dividing 200 by 81, we get 2 with a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 778617.02
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.

Advancing to step 11:
81 can be fit into 380 4 times, resulting in a remainder of 56.
Write down 4 as next digit of the result. 
Result so far: 778617.024
If we subtract 324 from 380, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 12:
The number 81 fits into 560 6 times, leaving a remainder of 74.
Use 6 as the next digit of our solution. 
Result so far: 778617.0246
Deduct 486 from 560 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 13:
The number 81 fits into 740 9 times, leaving a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 778617.02469
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.

Advancing to step 14:
81 goes into 110 1 times with a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 778617.024691
If we take 81 away from 110, we end up 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 15:
290 divided by 81 is 3 with a remainder of 47.
Write down 3 as next digit of the result. 
Result so far: 778617.0246913
If we subtract 243 from 290, we 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.

Going ahead to step 16:
470 divided by 81 is 5 with a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 778617.02469135
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 result is 778617.02469135 with a remainder of 6.5e-08.