We look at the division of 50717465 by 991 
The aim is to understand the frequency of 991 in 50717465.

On to step 1:
The number 991 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 991

Going ahead to step 2:
50 divided by 991 is 0 with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Include the next digit (7) from the dividend after 50, then repeat: 507 / 991

Advancing to step 3:
991 goes into 507 0 times with a remainder of 507.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 507, we get 507.
Include the next digit (1) from the dividend after 507, then repeat: 5071 / 991

Advancing to step 4:
991 goes into 5071 5 times with a remainder of 116.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 4955 from 5071 leaves us with 116.
Bring next digit (7) of the dividend behind the 116 and repeat the process: 1167 / 991

Step 5:
991 can be fit into 1167 1 times, resulting in a remainder of 176.
Put 1 as the next digit of the answer. 
Result so far: 51.0
Subtracting 991 from 1167 leaves us with 176.
Take the next digit (4) from the dividend and append it to 176, then repeat: 1764 / 991

Advancing to step 6:
1764 divided by 991 is 1 with a remainder of 773.
The next digit of our result is 1. 
Result so far: 511.0
If we subtract 991 from 1764, we get 773.
Bring next digit (6) of the dividend behind the 773 and repeat the process: 7736 / 991

On to step 7:
If we divide 7736 by 991, we get 7 and a remainder of 799.
The next digit of our result is 7. 
Result so far: 5117.0
Deduct 6937 from 7736 and we're left with 799.
Bring next digit (5) of the dividend behind the 799 and repeat the process: 7995 / 991

Let's proceed to step 8:
7995 divided by 991 is 8 with a remainder of 67.
The next digit of our result is 8. 
Result so far: 51178.0
The remainder is 67 after subtracting 7928 from 7995.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 9:
991 can be fit into 670 0 times, resulting in a remainder of 670.
Record the quotient 0 as the next digit in the result. 
Result so far: 51178.0
Deduct 0 from 670 and we're left with 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

On to step 10:
When dividing 6700 by 991, we get 6 with a remainder of 754.
Write down 6 as next digit of the result. 
Result so far: 51178.06
If we take 5946 away from 6700, we end up with 754.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7540, and continue the process.

Moving on to step 11:
991 goes into 7540 7 times with a remainder of 603.
Use 7 as the next digit of our solution. 
Result so far: 51178.067
If we subtract 6937 from 7540, we get 603.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6030, and continue the process.

Going ahead to step 12:
When dividing 6030 by 991, we get 6 with a remainder of 84.
The next digit of our result is 6. 
Result so far: 51178.0676
Subtracting 5946 from 6030 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 13:
The number 991 fits into 840 0 times, leaving a remainder of 840.
Write down 0 as next digit of the result. 
Result so far: 51178.0676
Subtract 0 from 840 to get 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Let's proceed to step 14:
When dividing 8400 by 991, we get 8 with a remainder of 472.
Record the quotient 8 as the next digit in the result. 
Result so far: 51178.067608
Deduct 7928 from 8400 and we're left with 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Let's proceed to step 15:
991 goes into 4720 4 times with a remainder of 756.
Use 4 as the next digit of our solution. 
Result so far: 51178.0676084
Deduct 3964 from 4720 and we're left with 756.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7560, and continue the process.

Moving on to step 16:
991 can be fit into 7560 7 times, resulting in a remainder of 623.
The number 7 becomes the next digit in our result. 
Result so far: 51178.06760847
The remainder is 623 after subtracting 6937 from 7560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6230, and continue the process.

Our division results in 51178.06760847 with a remaining 6.23e-07.