68660665 divided by 991 
The aim is to understand the frequency of 991 in 68660665.

Going ahead to step 1:
When dividing 6 by 991, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 991

Advancing to step 2:
If we divide 68 by 991, we get 0 and a remainder of 68.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Fetch the next digit (6) from the dividend, attach it to 68 and continue: 686 / 991

Advancing to step 3:
The number 991 fits into 686 0 times, leaving a remainder of 686.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 686 after subtracting 0 from 686.
Fetch the next digit (6) from the dividend, attach it to 686 and continue: 6866 / 991

Step 4:
991 goes into 6866 6 times with a remainder of 920.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 5946 away from 6866, we end up with 920.
Include the next digit (0) from the dividend after 920, then repeat: 9200 / 991

Step 5:
The number 991 fits into 9200 9 times, leaving a remainder of 281.
Record the quotient 9 as the next digit in the result. 
Result so far: 69.0
The remainder is 281 after subtracting 8919 from 9200.
Include the next digit (6) from the dividend after 281, then repeat: 2816 / 991

Let's proceed to step 6:
2816 divided by 991 is 2 with a remainder of 834.
Put 2 as the next digit of the answer. 
Result so far: 692.0
Subtracting 1982 from 2816 leaves us with 834.
Fetch the next digit (6) from the dividend, attach it to 834 and continue: 8346 / 991

Moving on to step 7:
991 can be fit into 8346 8 times, resulting in a remainder of 418.
Put 8 as the next digit of the answer. 
Result so far: 6928.0
The remainder is 418 after subtracting 7928 from 8346.
Fetch the next digit (5) from the dividend, attach it to 418 and continue: 4185 / 991

Moving on to step 8:
991 goes into 4185 4 times with a remainder of 221.
Write down 4 as next digit of the result. 
Result so far: 69284.0
Subtracting 3964 from 4185 leaves us with 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Moving on to step 9:
When dividing 2210 by 991, we get 2 with a remainder of 228.
Use 2 as the next digit of our solution. 
Result so far: 69284.2
Subtracting 1982 from 2210 leaves us with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Going ahead to step 10:
991 can be fit into 2280 2 times, resulting in a remainder of 298.
Use 2 as the next digit of our solution. 
Result so far: 69284.22
Deduct 1982 from 2280 and we're left with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Our division results in 69284.22 with a remaining 0.298.