We look at the division of 203168 by 91 
The aim is to understand the frequency of 91 in 203168.

Step 1:
If we divide 2 by 91, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 91

Let's proceed to step 2:
20 divided by 91 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Take the next digit (3) from the dividend and append it to 20, then repeat: 203 / 91

Step 3:
When dividing 203 by 91, we get 2 with a remainder of 21.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 182 from 203, we get 21.
Bring next digit (1) of the dividend behind the 21 and repeat the process: 211 / 91

Step 4:
When dividing 211 by 91, we get 2 with a remainder of 29.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
Deduct 182 from 211 and we're left with 29.
Append the next digit (6) from the dividend to 29 and continue with: 296 / 91

Going ahead to step 5:
The number 91 fits into 296 3 times, leaving a remainder of 23.
Put 3 as the next digit of the answer. 
Result so far: 223.0
Subtracting 273 from 296 leaves us with 23.
Fetch the next digit (8) from the dividend, attach it to 23 and continue: 238 / 91

Step 6:
The number 91 fits into 238 2 times, leaving a remainder of 56.
The number 2 becomes the next digit in our result. 
Result so far: 2232.0
Subtracting 182 from 238 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 7:
91 can be fit into 560 6 times, resulting in a remainder of 14.
The next digit of our result is 6. 
Result so far: 2232.6
Deduct 546 from 560 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 8:
140 divided by 91 is 1 with a remainder of 49.
The number 1 becomes the next digit in our result. 
Result so far: 2232.61
If we take 91 away from 140, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 9:
91 can be fit into 490 5 times, resulting in a remainder of 35.
The next digit of our result is 5. 
Result so far: 2232.615
If we subtract 455 from 490, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 10:
If we divide 350 by 91, we get 3 and a remainder of 77.
The next digit of our result is 3. 
Result so far: 2232.6153
If we subtract 273 from 350, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Going ahead to step 11:
91 can be fit into 770 8 times, resulting in a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 2232.61538
Deduct 728 from 770 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 12:
When dividing 420 by 91, we get 4 with a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 2232.615384
Subtract 364 from 420 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 13:
560 divided by 91 is 6 with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 2232.6153846
Deduct 546 from 560 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 14:
If we divide 140 by 91, we get 1 and a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 2232.61538461
Deduct 91 from 140 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

The final result is 2232.61538461 with a remainder of 4.9e-08.