We look at the division of 82777575 by 991 
The aim is to understand the frequency of 991 in 82777575.

Let's proceed to step 1:
991 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 991

Advancing to step 2:
When dividing 82 by 991, we get 0 with a remainder of 82.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 82 leaves us with 82.
Append the next digit (7) from the dividend to 82 and continue with: 827 / 991

Step 3:
When dividing 827 by 991, we get 0 with a remainder of 827.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 827, we end up with 827.
Bring next digit (7) of the dividend behind the 827 and repeat the process: 8277 / 991

Advancing to step 4:
The number 991 fits into 8277 8 times, leaving a remainder of 349.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 7928 from 8277, we get 349.
Grab the next digit (7) from the dividend, add it to 349, then carry on: 3497 / 991

On to step 5:
991 goes into 3497 3 times with a remainder of 524.
The number 3 becomes the next digit in our result. 
Result so far: 83.0
Subtract 2973 from 3497 to get 524.
Fetch the next digit (5) from the dividend, attach it to 524 and continue: 5245 / 991

On to step 6:
The number 991 fits into 5245 5 times, leaving a remainder of 290.
The next digit of our result is 5. 
Result so far: 835.0
Subtracting 4955 from 5245 leaves us with 290.
Include the next digit (7) from the dividend after 290, then repeat: 2907 / 991

Moving on to step 7:
2907 divided by 991 is 2 with a remainder of 925.
Write down 2 as next digit of the result. 
Result so far: 8352.0
If we subtract 1982 from 2907, we get 925.
Include the next digit (5) from the dividend after 925, then repeat: 9255 / 991

Going ahead to step 8:
If we divide 9255 by 991, we get 9 and a remainder of 336.
Use 9 as the next digit of our solution. 
Result so far: 83529.0
Subtracting 8919 from 9255 leaves us with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Moving on to step 9:
991 can be fit into 3360 3 times, resulting in a remainder of 387.
The next digit of our result is 3. 
Result so far: 83529.3
Subtracting 2973 from 3360 leaves us with 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Step 10:
3870 divided by 991 is 3 with a remainder of 897.
The number 3 becomes the next digit in our result. 
Result so far: 83529.33
Deduct 2973 from 3870 and we're left with 897.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8970, and continue the process.

The final outcome is 83529.33, with a leftover of 0.897.