Let's divide 384909 by 91
The aim is to understand the frequency of 91 in 384909.

Advancing to step 1:
When dividing 3 by 91, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 91

Moving on to step 2:
If we divide 38 by 91, we get 0 and a remainder of 38.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 38, we end up with 38.
Bring next digit (4) of the dividend behind the 38 and repeat the process: 384 / 91

Moving on to step 3:
The number 91 fits into 384 4 times, leaving a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 20 after subtracting 364 from 384.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 91

Moving on to step 4:
209 divided by 91 is 2 with a remainder of 27.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
Subtracting 182 from 209 leaves us with 27.
Include the next digit (0) from the dividend after 27, then repeat: 270 / 91

Step 5:
The number 91 fits into 270 2 times, leaving a remainder of 88.
Put 2 as the next digit of the answer. 
Result so far: 422.0
Subtracting 182 from 270 leaves us with 88.
Bring next digit (9) of the dividend behind the 88 and repeat the process: 889 / 91

Let's proceed to step 6:
91 can be fit into 889 9 times, resulting in a remainder of 70.
Use 9 as the next digit of our solution. 
Result so far: 4229.0
The remainder is 70 after subtracting 819 from 889.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 7:
91 goes into 700 7 times with a remainder of 63.
Write down 7 as next digit of the result. 
Result so far: 4229.7
If we subtract 637 from 700, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

On to step 8:
91 can be fit into 630 6 times, resulting in a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 4229.76
Subtracting 546 from 630 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Advancing to step 9:
91 can be fit into 840 9 times, resulting in a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 4229.769
If we subtract 819 from 840, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 10:
The number 91 fits into 210 2 times, leaving a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 4229.7692
If we take 182 away from 210, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 11:
91 goes into 280 3 times with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 4229.76923
The remainder is 7 after subtracting 273 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 12:
If we divide 70 by 91, we get 0 and a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 4229.76923
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 13:
91 goes into 700 7 times with a remainder of 63.
Write down 7 as next digit of the result. 
Result so far: 4229.7692307
If we take 637 away from 700, we end up with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 14:
If we divide 630 by 91, we get 6 and a remainder of 84.
Write down 6 as next digit of the result. 
Result so far: 4229.76923076
The remainder is 84 after subtracting 546 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

The final outcome is 4229.76923076, with a leftover of 8.4e-08.