We look at the division of 538113 by 91 
The aim is to understand the frequency of 91 in 538113.

On to step 1:
91 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 91

Advancing to step 2:
91 can be fit into 53 0 times, resulting in a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Append the next digit (8) from the dividend to 53 and continue with: 538 / 91

Let's proceed to step 3:
91 can be fit into 538 5 times, resulting in a remainder of 83.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 455 from 538 and we're left with 83.
Fetch the next digit (1) from the dividend, attach it to 83 and continue: 831 / 91

Let's proceed to step 4:
The number 91 fits into 831 9 times, leaving a remainder of 12.
Put 9 as the next digit of the answer. 
Result so far: 59.0
Subtracting 819 from 831 leaves us with 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 91

Advancing to step 5:
If we divide 121 by 91, we get 1 and a remainder of 30.
Record the quotient 1 as the next digit in the result. 
Result so far: 591.0
If we subtract 91 from 121, we get 30.
Grab the next digit (3) from the dividend, add it to 30, then carry on: 303 / 91

Going ahead to step 6:
The number 91 fits into 303 3 times, leaving a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 5913.0
Deduct 273 from 303 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 7:
300 divided by 91 is 3 with a remainder of 27.
The next digit of our result is 3. 
Result so far: 5913.3
Subtracting 273 from 300 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 8:
270 divided by 91 is 2 with a remainder of 88.
Record the quotient 2 as the next digit in the result. 
Result so far: 5913.32
Subtracting 182 from 270 leaves us with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Advancing to step 9:
91 goes into 880 9 times with a remainder of 61.
Put 9 as the next digit of the answer. 
Result so far: 5913.329
If we subtract 819 from 880, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 10:
When dividing 610 by 91, we get 6 with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 5913.3296
Subtract 546 from 610 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 11:
When dividing 640 by 91, we get 7 with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 5913.32967
If we subtract 637 from 640, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 12:
30 divided by 91 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 5913.32967
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 13:
The number 91 fits into 300 3 times, leaving a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 5913.3296703
Deduct 273 from 300 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 14:
The number 91 fits into 270 2 times, leaving a remainder of 88.
Put 2 as the next digit of the answer. 
Result so far: 5913.32967032
If we subtract 182 from 270, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

In conclusion, the division gives 5913.32967032 with a balance of 8.8e-08.