We look at the division of 49783649 by 991 
The aim is to understand the frequency of 991 in 49783649.

Let's proceed to step 1:
If we divide 4 by 991, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 991

On to step 2:
If we divide 49 by 991, we get 0 and a remainder of 49.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 49 after subtracting 0 from 49.
Fetch the next digit (7) from the dividend, attach it to 49 and continue: 497 / 991

Let's proceed to step 3:
If we divide 497 by 991, we get 0 and a remainder of 497.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 497, we end up with 497.
Grab the next digit (8) from the dividend, add it to 497, then carry on: 4978 / 991

On to step 4:
991 can be fit into 4978 5 times, resulting in a remainder of 23.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 4955 from 4978 leaves us with 23.
Bring next digit (3) of the dividend behind the 23 and repeat the process: 233 / 991

Let's proceed to step 5:
If we divide 233 by 991, we get 0 and a remainder of 233.
Use 0 as the next digit of our solution. 
Result so far: 50.0
If we subtract 0 from 233, we get 233.
Grab the next digit (6) from the dividend, add it to 233, then carry on: 2336 / 991

Moving on to step 6:
When dividing 2336 by 991, we get 2 with a remainder of 354.
The next digit of our result is 2. 
Result so far: 502.0
If we take 1982 away from 2336, we end up with 354.
Include the next digit (4) from the dividend after 354, then repeat: 3544 / 991

Advancing to step 7:
991 goes into 3544 3 times with a remainder of 571.
Record the quotient 3 as the next digit in the result. 
Result so far: 5023.0
Subtracting 2973 from 3544 leaves us with 571.
Grab the next digit (9) from the dividend, add it to 571, then carry on: 5719 / 991

On to step 8:
The number 991 fits into 5719 5 times, leaving a remainder of 764.
Write down 5 as next digit of the result. 
Result so far: 50235.0
Deduct 4955 from 5719 and we're left with 764.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7640, and continue the process.

Going ahead to step 9:
7640 divided by 991 is 7 with a remainder of 703.
Write down 7 as next digit of the result. 
Result so far: 50235.7
If we take 6937 away from 7640, we end up with 703.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7030, and continue the process.

On to step 10:
991 goes into 7030 7 times with a remainder of 93.
The number 7 becomes the next digit in our result. 
Result so far: 50235.77
If we subtract 6937 from 7030, we get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Our division results in 50235.77 with a remaining 0.093.