Let's divide 91434565 by 23
The aim is to understand the frequency of 23 in 91434565.

Advancing to step 1:
When dividing 9 by 23, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 23

Let's proceed to step 2:
23 can be fit into 91 3 times, resulting in a remainder of 22.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 69 from 91, we get 22.
Bring next digit (4) of the dividend behind the 22 and repeat the process: 224 / 23

On to step 3:
23 can be fit into 224 9 times, resulting in a remainder of 17.
The next digit of our result is 9. 
Result so far: 39.0
Subtract 207 from 224 to get 17.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 23

Let's proceed to step 4:
23 can be fit into 173 7 times, resulting in a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 397.0
The remainder is 12 after subtracting 161 from 173.
Fetch the next digit (4) from the dividend, attach it to 12 and continue: 124 / 23

Going ahead to step 5:
23 goes into 124 5 times with a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 3975.0
If we take 115 away from 124, we end up with 9.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 23

Let's proceed to step 6:
23 goes into 95 4 times with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 39754.0
If we subtract 92 from 95, we get 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 23

On to step 7:
When dividing 36 by 23, we get 1 with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 397541.0
Deduct 23 from 36 and we're left with 13.
Fetch the next digit (5) from the dividend, attach it to 13 and continue: 135 / 23

Going ahead to step 8:
135 divided by 23 is 5 with a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 3975415.0
The remainder is 20 after subtracting 115 from 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
200 divided by 23 is 8 with a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 3975415.8
Deduct 184 from 200 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
The number 23 fits into 160 6 times, leaving a remainder of 22.
Put 6 as the next digit of the answer. 
Result so far: 3975415.86
Subtracting 138 from 160 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 11:
23 can be fit into 220 9 times, resulting in a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 3975415.869
If we subtract 207 from 220, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 12:
23 goes into 130 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 3975415.8695
Subtract 115 from 130 to get 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 13:
If we divide 150 by 23, we get 6 and a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 3975415.86956
If we subtract 138 from 150, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 14:
120 divided by 23 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 3975415.869565
Subtracting 115 from 120 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 15:
50 divided by 23 is 2 with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 3975415.8695652
Subtract 46 from 50 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 16:
When dividing 40 by 23, we get 1 with a remainder of 17.
The next digit of our result is 1. 
Result so far: 3975415.86956521
Subtracting 23 from 40 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final outcome is 3975415.86956521, with a leftover of 1.7e-08.