47899 ÷ 91 
The aim is to understand the frequency of 91 in 47899.

Step 1:
If we divide 4 by 91, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (7) from the dividend and append it to 4, then repeat: 47 / 91

Moving on to step 2:
When dividing 47 by 91, we get 0 with a remainder of 47.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 47 to get 47.
Take the next digit (8) from the dividend and append it to 47, then repeat: 478 / 91

Moving on to step 3:
478 divided by 91 is 5 with a remainder of 23.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 455 from 478 leaves us with 23.
Take the next digit (9) from the dividend and append it to 23, then repeat: 239 / 91

Step 4:
If we divide 239 by 91, we get 2 and a remainder of 57.
Write down 2 as next digit of the result. 
Result so far: 52.0
If we take 182 away from 239, we end up with 57.
Bring next digit (9) of the dividend behind the 57 and repeat the process: 579 / 91

Step 5:
If we divide 579 by 91, we get 6 and a remainder of 33.
Write down 6 as next digit of the result. 
Result so far: 526.0
Subtracting 546 from 579 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 6:
330 divided by 91 is 3 with a remainder of 57.
Record the quotient 3 as the next digit in the result. 
Result so far: 526.3
If we take 273 away from 330, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 7:
91 goes into 570 6 times with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 526.36
The remainder is 24 after subtracting 546 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 8:
When dividing 240 by 91, we get 2 with a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 526.362
If we subtract 182 from 240, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 9:
91 goes into 580 6 times with a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 526.3626
Deduct 546 from 580 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 10:
If we divide 340 by 91, we get 3 and a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 526.36263
Subtract 273 from 340 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 11:
91 can be fit into 670 7 times, resulting in a remainder of 33.
The next digit of our result is 7. 
Result so far: 526.362637
If we take 637 away from 670, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 12:
330 divided by 91 is 3 with a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 526.3626373
The remainder is 57 after subtracting 273 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 13:
The number 91 fits into 570 6 times, leaving a remainder of 24.
The next digit of our result is 6. 
Result so far: 526.36263736
If we take 546 away from 570, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 526.36263736 with a remainder of 2.4e-08.