We divide 80730274 by 991
The aim is to understand the frequency of 991 in 80730274.

Going ahead to step 1:
The number 991 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 991

Let's proceed to step 2:
When dividing 80 by 991, we get 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Grab the next digit (7) from the dividend, add it to 80, then carry on: 807 / 991

On to step 3:
991 can be fit into 807 0 times, resulting in a remainder of 807.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 807, we get 807.
Bring next digit (3) of the dividend behind the 807 and repeat the process: 8073 / 991

Going ahead to step 4:
991 can be fit into 8073 8 times, resulting in a remainder of 145.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 7928 from 8073 leaves us with 145.
Bring next digit (0) of the dividend behind the 145 and repeat the process: 1450 / 991

On to step 5:
991 can be fit into 1450 1 times, resulting in a remainder of 459.
The next digit of our result is 1. 
Result so far: 81.0
Subtracting 991 from 1450 leaves us with 459.
Grab the next digit (2) from the dividend, add it to 459, then carry on: 4592 / 991

Moving on to step 6:
4592 divided by 991 is 4 with a remainder of 628.
Put 4 as the next digit of the answer. 
Result so far: 814.0
Subtracting 3964 from 4592 leaves us with 628.
Take the next digit (7) from the dividend and append it to 628, then repeat: 6287 / 991

Going ahead to step 7:
991 goes into 6287 6 times with a remainder of 341.
Use 6 as the next digit of our solution. 
Result so far: 8146.0
Subtracting 5946 from 6287 leaves us with 341.
Fetch the next digit (4) from the dividend, attach it to 341 and continue: 3414 / 991

On to step 8:
When dividing 3414 by 991, we get 3 with a remainder of 441.
Use 3 as the next digit of our solution. 
Result so far: 81463.0
Subtract 2973 from 3414 to get 441.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Going ahead to step 9:
If we divide 4410 by 991, we get 4 and a remainder of 446.
Put 4 as the next digit of the answer. 
Result so far: 81463.4
If we take 3964 away from 4410, we end up with 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

On to step 10:
When dividing 4460 by 991, we get 4 with a remainder of 496.
Put 4 as the next digit of the answer. 
Result so far: 81463.44
Subtracting 3964 from 4460 leaves us with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Our division results in 81463.44 with a remaining 0.496.