212311 divided by 91 
The aim is to understand the frequency of 91 in 212311.

Advancing to step 1:
91 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 91

Going ahead to step 2:
The number 91 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 91

Advancing to step 3:
91 can be fit into 212 2 times, resulting in a remainder of 30.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 30 after subtracting 182 from 212.
Fetch the next digit (3) from the dividend, attach it to 30 and continue: 303 / 91

Advancing to step 4:
If we divide 303 by 91, we get 3 and a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
Deduct 273 from 303 and we're left with 30.
Include the next digit (1) from the dividend after 30, then repeat: 301 / 91

Moving on to step 5:
If we divide 301 by 91, we get 3 and a remainder of 28.
Write down 3 as next digit of the result. 
Result so far: 233.0
The remainder is 28 after subtracting 273 from 301.
Fetch the next digit (1) from the dividend, attach it to 28 and continue: 281 / 91

On to step 6:
91 can be fit into 281 3 times, resulting in a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 2333.0
Subtracting 273 from 281 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
80 divided by 91 is 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 2333.0
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
91 can be fit into 800 8 times, resulting in a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 2333.08
Deduct 728 from 800 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 9:
If we divide 720 by 91, we get 7 and a remainder of 83.
Record the quotient 7 as the next digit in the result. 
Result so far: 2333.087
Subtracting 637 from 720 leaves us with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

On to step 10:
The number 91 fits into 830 9 times, leaving a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 2333.0879
The remainder is 11 after subtracting 819 from 830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 11:
91 goes into 110 1 times with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 2333.08791
Subtract 91 from 110 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 12:
If we divide 190 by 91, we get 2 and a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 2333.087912
If we take 182 away from 190, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 13:
When dividing 80 by 91, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 2333.087912
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 14:
When dividing 800 by 91, we get 8 with a remainder of 72.
The next digit of our result is 8. 
Result so far: 2333.08791208
Subtracting 728 from 800 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

In conclusion, the division gives 2333.08791208 with a balance of 7.2e-08.