68633357 ÷ 991 
The aim is to understand the frequency of 991 in 68633357.

Advancing to step 1:
When dividing 6 by 991, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 991

On to step 2:
If we divide 68 by 991, we get 0 and a remainder of 68.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 68, we get 68.
Take the next digit (6) from the dividend and append it to 68, then repeat: 686 / 991

Going ahead to step 3:
When dividing 686 by 991, we get 0 with a remainder of 686.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 686 leaves us with 686.
Grab the next digit (3) from the dividend, add it to 686, then carry on: 6863 / 991

On to step 4:
991 can be fit into 6863 6 times, resulting in a remainder of 917.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 5946 from 6863 leaves us with 917.
Append the next digit (3) from the dividend to 917 and continue with: 9173 / 991

On to step 5:
The number 991 fits into 9173 9 times, leaving a remainder of 254.
Use 9 as the next digit of our solution. 
Result so far: 69.0
Deduct 8919 from 9173 and we're left with 254.
Fetch the next digit (3) from the dividend, attach it to 254 and continue: 2543 / 991

Step 6:
If we divide 2543 by 991, we get 2 and a remainder of 561.
Write down 2 as next digit of the result. 
Result so far: 692.0
Subtracting 1982 from 2543 leaves us with 561.
Append the next digit (5) from the dividend to 561 and continue with: 5615 / 991

Advancing to step 7:
5615 divided by 991 is 5 with a remainder of 660.
The next digit of our result is 5. 
Result so far: 6925.0
Subtracting 4955 from 5615 leaves us with 660.
Include the next digit (7) from the dividend after 660, then repeat: 6607 / 991

On to step 8:
The number 991 fits into 6607 6 times, leaving a remainder of 661.
Write down 6 as next digit of the result. 
Result so far: 69256.0
If we subtract 5946 from 6607, we get 661.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6610, and continue the process.

On to step 9:
The number 991 fits into 6610 6 times, leaving a remainder of 664.
Use 6 as the next digit of our solution. 
Result so far: 69256.6
If we take 5946 away from 6610, we end up with 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

Moving on to step 10:
6640 divided by 991 is 6 with a remainder of 694.
The next digit of our result is 6. 
Result so far: 69256.66
Subtracting 5946 from 6640 leaves us with 694.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6940, and continue the process.

Our division results in 69256.66 with a remaining 0.694.