We divide 312666 by 91
The aim is to understand the frequency of 91 in 312666.

Let's proceed to step 1:
91 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 91

Let's proceed to step 2:
91 goes into 31 0 times with a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Take the next digit (2) from the dividend and append it to 31, then repeat: 312 / 91

Let's proceed to step 3:
If we divide 312 by 91, we get 3 and a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 273 from 312 leaves us with 39.
Bring next digit (6) of the dividend behind the 39 and repeat the process: 396 / 91

Step 4:
91 can be fit into 396 4 times, resulting in a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 34.0
Subtracting 364 from 396 leaves us with 32.
Append the next digit (6) from the dividend to 32 and continue with: 326 / 91

Going ahead to step 5:
If we divide 326 by 91, we get 3 and a remainder of 53.
Record the quotient 3 as the next digit in the result. 
Result so far: 343.0
If we subtract 273 from 326, we get 53.
Include the next digit (6) from the dividend after 53, then repeat: 536 / 91

Let's proceed to step 6:
If we divide 536 by 91, we get 5 and a remainder of 81.
Put 5 as the next digit of the answer. 
Result so far: 3435.0
Subtracting 455 from 536 leaves us 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.

Step 7:
810 divided by 91 is 8 with a remainder of 82.
Record the quotient 8 as the next digit in the result. 
Result so far: 3435.8
Subtracting 728 from 810 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 8:
If we divide 820 by 91, we get 9 and a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 3435.89
The remainder is 1 after subtracting 819 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
10 divided by 91 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 3435.89
If we take 0 away from 10, we end up with 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 10:
91 can be fit into 100 1 times, resulting in a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 3435.8901
Deduct 91 from 100 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 11:
If we divide 90 by 91, we get 0 and a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 3435.8901
The remainder is 90 after subtracting 0 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 12:
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: 3435.890109
The remainder is 81 after subtracting 819 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Advancing to step 13:
91 can be fit into 810 8 times, resulting in a remainder of 82.
Use 8 as the next digit of our solution. 
Result so far: 3435.8901098
If we subtract 728 from 810, we 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.

Going ahead to step 14:
The number 91 fits into 820 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 3435.89010989
The remainder is 1 after subtracting 819 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

In conclusion, the division gives 3435.89010989 with a balance of 1e-09.