We're dividing 522666 by 81 
The aim is to understand the frequency of 81 in 522666.

Advancing to step 1:
The number 81 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 81

On to step 2:
The number 81 fits into 52 0 times, leaving a remainder of 52.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Grab the next digit (2) from the dividend, add it to 52, then carry on: 522 / 81

Moving on to step 3:
81 goes into 522 6 times with a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 36 after subtracting 486 from 522.
Include the next digit (6) from the dividend after 36, then repeat: 366 / 81

Going ahead to step 4:
If we divide 366 by 81, we get 4 and a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
If we take 324 away from 366, we end up with 42.
Take the next digit (6) from the dividend and append it to 42, then repeat: 426 / 81

Step 5:
If we divide 426 by 81, we get 5 and a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 645.0
Deduct 405 from 426 and we're left with 21.
Fetch the next digit (6) from the dividend, attach it to 21 and continue: 216 / 81

Advancing to step 6:
When dividing 216 by 81, we get 2 with a remainder of 54.
The number 2 becomes the next digit in our result. 
Result so far: 6452.0
The remainder is 54 after subtracting 162 from 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 7:
When dividing 540 by 81, we get 6 with a remainder of 54.
The number 6 becomes the next digit in our result. 
Result so far: 6452.6
The remainder is 54 after subtracting 486 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 8:
81 goes into 540 6 times with a remainder of 54.
The number 6 becomes the next digit in our result. 
Result so far: 6452.66
If we take 486 away from 540, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final outcome is 6452.66, with a leftover of 0.054.