426288 ÷ 91 
The aim is to understand the frequency of 91 in 426288.

On to step 1:
When dividing 4 by 91, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 91

Let's proceed to step 2:
91 can be fit into 42 0 times, resulting in a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Bring next digit (6) of the dividend behind the 42 and repeat the process: 426 / 91

Going ahead to step 3:
91 goes into 426 4 times with a remainder of 62.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 364 from 426 and we're left with 62.
Grab the next digit (2) from the dividend, add it to 62, then carry on: 622 / 91

Let's proceed to step 4:
622 divided by 91 is 6 with a remainder of 76.
Use 6 as the next digit of our solution. 
Result so far: 46.0
Deduct 546 from 622 and we're left with 76.
Append the next digit (8) from the dividend to 76 and continue with: 768 / 91

On to step 5:
768 divided by 91 is 8 with a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 468.0
If we take 728 away from 768, we end up with 40.
Append the next digit (8) from the dividend to 40 and continue with: 408 / 91

Let's proceed to step 6:
When dividing 408 by 91, we get 4 with a remainder of 44.
Put 4 as the next digit of the answer. 
Result so far: 4684.0
Deduct 364 from 408 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 7:
When dividing 440 by 91, we get 4 with a remainder of 76.
The next digit of our result is 4. 
Result so far: 4684.4
If we take 364 away from 440, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 8:
The number 91 fits into 760 8 times, leaving a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 4684.48
Subtracting 728 from 760 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 9:
When dividing 320 by 91, we get 3 with a remainder of 47.
The number 3 becomes the next digit in our result. 
Result so far: 4684.483
Subtract 273 from 320 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 10:
91 goes into 470 5 times with a remainder of 15.
The next digit of our result is 5. 
Result so far: 4684.4835
If we take 455 away from 470, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 11:
91 goes into 150 1 times with a remainder of 59.
Write down 1 as next digit of the result. 
Result so far: 4684.48351
Subtracting 91 from 150 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 12:
590 divided by 91 is 6 with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 4684.483516
Subtract 546 from 590 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 13:
If we divide 440 by 91, we get 4 and a remainder of 76.
The next digit of our result is 4. 
Result so far: 4684.4835164
If we subtract 364 from 440, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Going ahead to step 14:
91 can be fit into 760 8 times, resulting in a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 4684.48351648
The remainder is 32 after subtracting 728 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

In conclusion, the division gives 4684.48351648 with a balance of 3.2e-08.