Let's divide 529975 by 81
The aim is to understand the frequency of 81 in 529975.

Advancing to step 1:
5 divided by 81 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 81

Moving on to step 2:
When dividing 52 by 81, we get 0 with a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 52 leaves us with 52.
Fetch the next digit (9) from the dividend, attach it to 52 and continue: 529 / 81

Moving on to step 3:
529 divided by 81 is 6 with a remainder of 43.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtracting 486 from 529 leaves us with 43.
Take the next digit (9) from the dividend and append it to 43, then repeat: 439 / 81

Let's proceed to step 4:
When dividing 439 by 81, we get 5 with a remainder of 34.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
If we subtract 405 from 439, we get 34.
Bring next digit (7) of the dividend behind the 34 and repeat the process: 347 / 81

On to step 5:
When dividing 347 by 81, we get 4 with a remainder of 23.
Record the quotient 4 as the next digit in the result. 
Result so far: 654.0
Deduct 324 from 347 and we're left with 23.
Bring next digit (5) of the dividend behind the 23 and repeat the process: 235 / 81

Step 6:
If we divide 235 by 81, we get 2 and a remainder of 73.
Write down 2 as next digit of the result. 
Result so far: 6542.0
Subtract 162 from 235 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 7:
When dividing 730 by 81, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 6542.9
If we take 729 away from 730, we end up 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.

Going ahead to step 8:
When dividing 10 by 81, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 6542.9
If we take 0 away from 10, we end up 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.

On to step 9:
81 goes into 100 1 times with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 6542.901
If we take 81 away from 100, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 10:
190 divided by 81 is 2 with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 6542.9012
The remainder is 28 after subtracting 162 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 11:
280 divided by 81 is 3 with a remainder of 37.
The next digit of our result is 3. 
Result so far: 6542.90123
If we subtract 243 from 280, we 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.

Step 12:
81 goes into 370 4 times with a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 6542.901234
The remainder is 46 after subtracting 324 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 13:
The number 81 fits into 460 5 times, leaving a remainder of 55.
Use 5 as the next digit of our solution. 
Result so far: 6542.9012345
Subtracting 405 from 460 leaves us with 55.
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 14:
If we divide 550 by 81, we get 6 and a remainder of 64.
The next digit of our result is 6. 
Result so far: 6542.90123456
The remainder is 64 after subtracting 486 from 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

After the division, we end up with 6542.90123456 and a remainder of 6.4e-08.