We divide 20631253 by 991
The aim is to understand the frequency of 991 in 20631253.

Moving on to step 1:
991 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 991

On to step 2:
The number 991 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 20, we get 20.
Fetch the next digit (6) from the dividend, attach it to 20 and continue: 206 / 991

Moving on to step 3:
The number 991 fits into 206 0 times, leaving a remainder of 206.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 206 after subtracting 0 from 206.
Take the next digit (3) from the dividend and append it to 206, then repeat: 2063 / 991

Step 4:
The number 991 fits into 2063 2 times, leaving a remainder of 81.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 1982 from 2063 leaves us with 81.
Append the next digit (1) from the dividend to 81 and continue with: 811 / 991

Step 5:
When dividing 811 by 991, we get 0 with a remainder of 811.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we subtract 0 from 811, we get 811.
Grab the next digit (2) from the dividend, add it to 811, then carry on: 8112 / 991

Step 6:
The number 991 fits into 8112 8 times, leaving a remainder of 184.
Write down 8 as next digit of the result. 
Result so far: 208.0
If we subtract 7928 from 8112, we get 184.
Bring next digit (5) of the dividend behind the 184 and repeat the process: 1845 / 991

Step 7:
If we divide 1845 by 991, we get 1 and a remainder of 854.
Write down 1 as next digit of the result. 
Result so far: 2081.0
Subtract 991 from 1845 to get 854.
Append the next digit (3) from the dividend to 854 and continue with: 8543 / 991

Going ahead to step 8:
8543 divided by 991 is 8 with a remainder of 615.
Put 8 as the next digit of the answer. 
Result so far: 20818.0
If we take 7928 away from 8543, we end up with 615.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

Let's proceed to step 9:
If we divide 6150 by 991, we get 6 and a remainder of 204.
Put 6 as the next digit of the answer. 
Result so far: 20818.6
If we subtract 5946 from 6150, we get 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Let's proceed to step 10:
991 goes into 2040 2 times with a remainder of 58.
The next digit of our result is 2. 
Result so far: 20818.62
Subtracting 1982 from 2040 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 11:
991 can be fit into 580 0 times, resulting in a remainder of 580.
Use 0 as the next digit of our solution. 
Result so far: 20818.62
The remainder is 580 after subtracting 0 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Going ahead to step 12:
When dividing 5800 by 991, we get 5 with a remainder of 845.
Use 5 as the next digit of our solution. 
Result so far: 20818.6205
Subtract 4955 from 5800 to get 845.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8450, and continue the process.

Going ahead to step 13:
If we divide 8450 by 991, we get 8 and a remainder of 522.
Use 8 as the next digit of our solution. 
Result so far: 20818.62058
Deduct 7928 from 8450 and we're left with 522.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Moving on to step 14:
If we divide 5220 by 991, we get 5 and a remainder of 265.
Use 5 as the next digit of our solution. 
Result so far: 20818.620585
Subtracting 4955 from 5220 leaves us with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Moving on to step 15:
If we divide 2650 by 991, we get 2 and a remainder of 668.
Put 2 as the next digit of the answer. 
Result so far: 20818.6205852
If we take 1982 away from 2650, we end up with 668.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6680, and continue the process.

Step 16:
The number 991 fits into 6680 6 times, leaving a remainder of 734.
The number 6 becomes the next digit in our result. 
Result so far: 20818.62058526
Subtracting 5946 from 6680 leaves us with 734.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7340, and continue the process.

The final outcome is 20818.62058526, with a leftover of 7.34e-07.