730103 ÷ 91 
The aim is to understand the frequency of 91 in 730103.

On to step 1:
If we divide 7 by 91, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 91

Step 2:
73 divided by 91 is 0 with a remainder of 73.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 73 and we're left with 73.
Fetch the next digit (0) from the dividend, attach it to 73 and continue: 730 / 91

Step 3:
91 can be fit into 730 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 8.0
Deduct 728 from 730 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 91

Moving on to step 4:
If we divide 21 by 91, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 80.0
Deduct 0 from 21 and we're left with 21.
Bring next digit (0) of the dividend behind the 21 and repeat the process: 210 / 91

Advancing to step 5:
210 divided by 91 is 2 with a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 802.0
Subtract 182 from 210 to get 28.
Grab the next digit (3) from the dividend, add it to 28, then carry on: 283 / 91

Step 6:
If we divide 283 by 91, we get 3 and a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 8023.0
If we subtract 273 from 283, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
When dividing 100 by 91, we get 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 8023.1
If we subtract 91 from 100, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 8:
90 divided by 91 is 0 with a remainder of 90.
The next digit of our result is 0. 
Result so far: 8023.1
Deduct 0 from 90 and we're left with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 9:
If we divide 900 by 91, we get 9 and a remainder of 81.
Record the quotient 9 as the next digit in the result. 
Result so far: 8023.109
Deduct 819 from 900 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 10:
The number 91 fits into 810 8 times, leaving a remainder of 82.
Write down 8 as next digit of the result. 
Result so far: 8023.1098
Subtract 728 from 810 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 11:
When dividing 820 by 91, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 8023.10989
If we take 819 away from 820, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 12:
The number 91 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 8023.10989
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 13:
100 divided by 91 is 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 8023.1098901
If we subtract 91 from 100, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 14:
When dividing 90 by 91, we get 0 with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 8023.1098901
Subtracting 0 from 90 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

The final result is 8023.1098901 with a remainder of 9e-08.