98370513 ÷ 991 
The aim is to understand the frequency of 991 in 98370513.

Going ahead to step 1:
9 divided by 991 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 991

Going ahead to step 2:
98 divided by 991 is 0 with a remainder of 98.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 98, we end up with 98.
Append the next digit (3) from the dividend to 98 and continue with: 983 / 991

Step 3:
When dividing 983 by 991, we get 0 with a remainder of 983.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 983, we end up with 983.
Include the next digit (7) from the dividend after 983, then repeat: 9837 / 991

Moving on to step 4:
9837 divided by 991 is 9 with a remainder of 918.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 8919 from 9837 leaves us with 918.
Grab the next digit (0) from the dividend, add it to 918, then carry on: 9180 / 991

Step 5:
9180 divided by 991 is 9 with a remainder of 261.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
If we subtract 8919 from 9180, we get 261.
Fetch the next digit (5) from the dividend, attach it to 261 and continue: 2615 / 991

Advancing to step 6:
The number 991 fits into 2615 2 times, leaving a remainder of 633.
Put 2 as the next digit of the answer. 
Result so far: 992.0
If we subtract 1982 from 2615, we get 633.
Grab the next digit (1) from the dividend, add it to 633, then carry on: 6331 / 991

Going ahead to step 7:
The number 991 fits into 6331 6 times, leaving a remainder of 385.
The next digit of our result is 6. 
Result so far: 9926.0
Subtract 5946 from 6331 to get 385.
Fetch the next digit (3) from the dividend, attach it to 385 and continue: 3853 / 991

Let's proceed to step 8:
991 can be fit into 3853 3 times, resulting in a remainder of 880.
Write down 3 as next digit of the result. 
Result so far: 99263.0
Subtract 2973 from 3853 to get 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8800, and continue the process.

Moving on to step 9:
8800 divided by 991 is 8 with a remainder of 872.
Put 8 as the next digit of the answer. 
Result so far: 99263.8
If we subtract 7928 from 8800, we get 872.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8720, and continue the process.

Let's proceed to step 10:
991 goes into 8720 8 times with a remainder of 792.
Write down 8 as next digit of the result. 
Result so far: 99263.88
If we subtract 7928 from 8720, we get 792.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7920, and continue the process.

The final result is 99263.88 with a remainder of 0.792.