616752 divided by 81 
The aim is to understand the frequency of 81 in 616752.

Advancing to step 1:
The number 81 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 81

Step 2:
When dividing 61 by 81, we get 0 with a remainder of 61.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 61, we get 61.
Append the next digit (6) from the dividend to 61 and continue with: 616 / 81

Going ahead to step 3:
If we divide 616 by 81, we get 7 and a remainder of 49.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 49 after subtracting 567 from 616.
Grab the next digit (7) from the dividend, add it to 49, then carry on: 497 / 81

Moving on to step 4:
The number 81 fits into 497 6 times, leaving a remainder of 11.
Put 6 as the next digit of the answer. 
Result so far: 76.0
If we subtract 486 from 497, we get 11.
Include the next digit (5) from the dividend after 11, then repeat: 115 / 81

Let's proceed to step 5:
When dividing 115 by 81, we get 1 with a remainder of 34.
Write down 1 as next digit of the result. 
Result so far: 761.0
Subtract 81 from 115 to get 34.
Grab the next digit (2) from the dividend, add it to 34, then carry on: 342 / 81

Step 6:
342 divided by 81 is 4 with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 7614.0
Deduct 324 from 342 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
When dividing 180 by 81, we get 2 with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 7614.2
Subtract 162 from 180 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 8:
When dividing 180 by 81, we get 2 with a remainder of 18.
The next digit of our result is 2. 
Result so far: 7614.22
The remainder is 18 after subtracting 162 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final outcome is 7614.22, with a leftover of 0.018.