We're dividing 423807 by 23 
The aim is to understand the frequency of 23 in 423807.

Advancing to step 1:
23 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 23

Moving on to step 2:
42 divided by 23 is 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 23 from 42 leaves us with 19.
Bring next digit (3) of the dividend behind the 19 and repeat the process: 193 / 23

Moving on to step 3:
If we divide 193 by 23, we get 8 and a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we subtract 184 from 193, we get 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 23

Going ahead to step 4:
If we divide 98 by 23, we get 4 and a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 184.0
The remainder is 6 after subtracting 92 from 98.
Take the next digit (0) from the dividend and append it to 6, then repeat: 60 / 23

On to step 5:
60 divided by 23 is 2 with a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 1842.0
Subtracting 46 from 60 leaves us with 14.
Bring next digit (7) of the dividend behind the 14 and repeat the process: 147 / 23

Advancing to step 6:
23 goes into 147 6 times with a remainder of 9.
The next digit of our result is 6. 
Result so far: 18426.0
The remainder is 9 after subtracting 138 from 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
90 divided by 23 is 3 with a remainder of 21.
Write down 3 as next digit of the result. 
Result so far: 18426.3
Deduct 69 from 90 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 8:
23 can be fit into 210 9 times, resulting in a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 18426.39
If we take 207 away from 210, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 9:
30 divided by 23 is 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 18426.391
Deduct 23 from 30 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 10:
23 goes into 70 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 18426.3913
Deduct 69 from 70 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 11:
When dividing 10 by 23, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 18426.3913
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 12:
The number 23 fits into 100 4 times, leaving a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 18426.391304
The remainder is 8 after subtracting 92 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 13:
23 goes into 80 3 times with a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 18426.3913043
Deduct 69 from 80 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 14:
23 can be fit into 110 4 times, resulting in a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 18426.39130434
If we subtract 92 from 110, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 18426.39130434 with a remaining 1.8e-08.