Let's divide 17570291 by 991
The aim is to understand the frequency of 991 in 17570291.

Let's proceed to step 1:
If we divide 1 by 991, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 991

Advancing to step 2:
The number 991 fits into 17 0 times, leaving a remainder of 17.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 17, we get 17.
Bring next digit (5) of the dividend behind the 17 and repeat the process: 175 / 991

Moving on to step 3:
When dividing 175 by 991, we get 0 with a remainder of 175.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 175, we end up with 175.
Bring next digit (7) of the dividend behind the 175 and repeat the process: 1757 / 991

Advancing to step 4:
991 can be fit into 1757 1 times, resulting in a remainder of 766.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 991 from 1757 leaves us with 766.
Take the next digit (0) from the dividend and append it to 766, then repeat: 7660 / 991

Let's proceed to step 5:
991 can be fit into 7660 7 times, resulting in a remainder of 723.
The next digit of our result is 7. 
Result so far: 17.0
Subtract 6937 from 7660 to get 723.
Take the next digit (2) from the dividend and append it to 723, then repeat: 7232 / 991

Advancing to step 6:
If we divide 7232 by 991, we get 7 and a remainder of 295.
Put 7 as the next digit of the answer. 
Result so far: 177.0
If we take 6937 away from 7232, we end up with 295.
Grab the next digit (9) from the dividend, add it to 295, then carry on: 2959 / 991

Going ahead to step 7:
991 can be fit into 2959 2 times, resulting in a remainder of 977.
Use 2 as the next digit of our solution. 
Result so far: 1772.0
Subtract 1982 from 2959 to get 977.
Include the next digit (1) from the dividend after 977, then repeat: 9771 / 991

Moving on to step 8:
9771 divided by 991 is 9 with a remainder of 852.
Record the quotient 9 as the next digit in the result. 
Result so far: 17729.0
The remainder is 852 after subtracting 8919 from 9771.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8520, and continue the process.

Let's proceed to step 9:
If we divide 8520 by 991, we get 8 and a remainder of 592.
The next digit of our result is 8. 
Result so far: 17729.8
Deduct 7928 from 8520 and we're left with 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Going ahead to step 10:
When dividing 5920 by 991, we get 5 with a remainder of 965.
Write down 5 as next digit of the result. 
Result so far: 17729.85
If we take 4955 away from 5920, we end up with 965.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9650, and continue the process.

On to step 11:
991 goes into 9650 9 times with a remainder of 731.
The number 9 becomes the next digit in our result. 
Result so far: 17729.859
Subtracting 8919 from 9650 leaves us with 731.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7310, and continue the process.

Going ahead to step 12:
The number 991 fits into 7310 7 times, leaving a remainder of 373.
The next digit of our result is 7. 
Result so far: 17729.8597
The remainder is 373 after subtracting 6937 from 7310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Let's proceed to step 13:
The number 991 fits into 3730 3 times, leaving a remainder of 757.
The number 3 becomes the next digit in our result. 
Result so far: 17729.85973
Subtracting 2973 from 3730 leaves us with 757.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7570, and continue the process.

Moving on to step 14:
If we divide 7570 by 991, we get 7 and a remainder of 633.
The next digit of our result is 7. 
Result so far: 17729.859737
If we subtract 6937 from 7570, we get 633.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6330, and continue the process.

Advancing to step 15:
The number 991 fits into 6330 6 times, leaving a remainder of 384.
Record the quotient 6 as the next digit in the result. 
Result so far: 17729.8597376
If we subtract 5946 from 6330, we get 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Advancing to step 16:
991 can be fit into 3840 3 times, resulting in a remainder of 867.
The next digit of our result is 3. 
Result so far: 17729.85973763
If we take 2973 away from 3840, we end up with 867.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8670, and continue the process.

The final outcome is 17729.85973763, with a leftover of 8.67e-07.