Let's divide 90825823 by 991
The aim is to understand the frequency of 991 in 90825823.

Moving on to step 1:
The number 991 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 991

Let's proceed to step 2:
The number 991 fits into 90 0 times, leaving a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Grab the next digit (8) from the dividend, add it to 90, then carry on: 908 / 991

Let's proceed to step 3:
The number 991 fits into 908 0 times, leaving a remainder of 908.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 908, we get 908.
Fetch the next digit (2) from the dividend, attach it to 908 and continue: 9082 / 991

Step 4:
9082 divided by 991 is 9 with a remainder of 163.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 8919 away from 9082, we end up with 163.
Grab the next digit (5) from the dividend, add it to 163, then carry on: 1635 / 991

On to step 5:
991 can be fit into 1635 1 times, resulting in a remainder of 644.
The next digit of our result is 1. 
Result so far: 91.0
The remainder is 644 after subtracting 991 from 1635.
Bring next digit (8) of the dividend behind the 644 and repeat the process: 6448 / 991

Let's proceed to step 6:
991 goes into 6448 6 times with a remainder of 502.
Write down 6 as next digit of the result. 
Result so far: 916.0
Subtracting 5946 from 6448 leaves us with 502.
Take the next digit (2) from the dividend and append it to 502, then repeat: 5022 / 991

Moving on to step 7:
5022 divided by 991 is 5 with a remainder of 67.
Use 5 as the next digit of our solution. 
Result so far: 9165.0
Subtract 4955 from 5022 to get 67.
Bring next digit (3) of the dividend behind the 67 and repeat the process: 673 / 991

On to step 8:
991 can be fit into 673 0 times, resulting in a remainder of 673.
The next digit of our result is 0. 
Result so far: 91650.0
Subtract 0 from 673 to get 673.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6730, and continue the process.

Step 9:
991 can be fit into 6730 6 times, resulting in a remainder of 784.
Put 6 as the next digit of the answer. 
Result so far: 91650.6
Subtract 5946 from 6730 to get 784.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7840, and continue the process.

Step 10:
The number 991 fits into 7840 7 times, leaving a remainder of 903.
Write down 7 as next digit of the result. 
Result so far: 91650.67
If we subtract 6937 from 7840, we get 903.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9030, and continue the process.

On to step 11:
9030 divided by 991 is 9 with a remainder of 111.
Use 9 as the next digit of our solution. 
Result so far: 91650.679
If we subtract 8919 from 9030, we get 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

On to step 12:
If we divide 1110 by 991, we get 1 and a remainder of 119.
Use 1 as the next digit of our solution. 
Result so far: 91650.6791
The remainder is 119 after subtracting 991 from 1110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Going ahead to step 13:
1190 divided by 991 is 1 with a remainder of 199.
Record the quotient 1 as the next digit in the result. 
Result so far: 91650.67911
If we take 991 away from 1190, we end up with 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

The final outcome is 91650.67911, with a leftover of 0.000199.