We divide 99204321 by 991
The aim is to understand the frequency of 991 in 99204321.

Moving on to step 1:
991 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 991

Step 2:
991 goes into 99 0 times with a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Bring next digit (2) of the dividend behind the 99 and repeat the process: 992 / 991

On to step 3:
991 goes into 992 1 times with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 991 from 992 and we're left with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 991

Moving on to step 4:
10 divided by 991 is 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtracting 0 from 10 leaves us with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 991

Moving on to step 5:
991 goes into 104 0 times with a remainder of 104.
The next digit of our result is 0. 
Result so far: 100.0
Deduct 0 from 104 and we're left with 104.
Fetch the next digit (3) from the dividend, attach it to 104 and continue: 1043 / 991

On to step 6:
991 goes into 1043 1 times with a remainder of 52.
The next digit of our result is 1. 
Result so far: 1001.0
If we subtract 991 from 1043, we get 52.
Fetch the next digit (2) from the dividend, attach it to 52 and continue: 522 / 991

Let's proceed to step 7:
522 divided by 991 is 0 with a remainder of 522.
Write down 0 as next digit of the result. 
Result so far: 10010.0
Subtracting 0 from 522 leaves us with 522.
Take the next digit (1) from the dividend and append it to 522, then repeat: 5221 / 991

Let's proceed to step 8:
991 goes into 5221 5 times with a remainder of 266.
Use 5 as the next digit of our solution. 
Result so far: 100105.0
If we subtract 4955 from 5221, we get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Step 9:
If we divide 2660 by 991, we get 2 and a remainder of 678.
Record the quotient 2 as the next digit in the result. 
Result so far: 100105.2
If we take 1982 away from 2660, we end up with 678.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6780, and continue the process.

Going ahead to step 10:
6780 divided by 991 is 6 with a remainder of 834.
The number 6 becomes the next digit in our result. 
Result so far: 100105.26
Deduct 5946 from 6780 and we're left with 834.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8340, and continue the process.

Step 11:
991 goes into 8340 8 times with a remainder of 412.
The next digit of our result is 8. 
Result so far: 100105.268
Subtract 7928 from 8340 to get 412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

Moving on to step 12:
991 goes into 4120 4 times with a remainder of 156.
Record the quotient 4 as the next digit in the result. 
Result so far: 100105.2684
Subtracting 3964 from 4120 leaves us with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Step 13:
The number 991 fits into 1560 1 times, leaving a remainder of 569.
The number 1 becomes the next digit in our result. 
Result so far: 100105.26841
The remainder is 569 after subtracting 991 from 1560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5690, and continue the process.

On to step 14:
5690 divided by 991 is 5 with a remainder of 735.
Use 5 as the next digit of our solution. 
Result so far: 100105.268415
Deduct 4955 from 5690 and we're left with 735.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7350, and continue the process.

Moving on to step 15:
When dividing 7350 by 991, we get 7 with a remainder of 413.
Use 7 as the next digit of our solution. 
Result so far: 100105.2684157
The remainder is 413 after subtracting 6937 from 7350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4130, and continue the process.

Moving on to step 16:
4130 divided by 991 is 4 with a remainder of 166.
Put 4 as the next digit of the answer. 
Result so far: 100105.26841574
Deduct 3964 from 4130 and we're left with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

After the division, we end up with 100105.26841574 and a remainder of 1.66e-07.