665251 divided by 23 
The aim is to understand the frequency of 23 in 665251.

Advancing to step 1:
If we divide 6 by 23, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 23

Moving on to step 2:
23 can be fit into 66 2 times, resulting in a remainder of 20.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 46 from 66 to get 20.
Include the next digit (5) from the dividend after 20, then repeat: 205 / 23

On to step 3:
23 can be fit into 205 8 times, resulting in a remainder of 21.
Put 8 as the next digit of the answer. 
Result so far: 28.0
Deduct 184 from 205 and we're left with 21.
Fetch the next digit (2) from the dividend, attach it to 21 and continue: 212 / 23

Going ahead to step 4:
23 goes into 212 9 times with a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 289.0
Subtract 207 from 212 to get 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 23

Moving on to step 5:
55 divided by 23 is 2 with a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 2892.0
The remainder is 9 after subtracting 46 from 55.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 23

Advancing to step 6:
23 can be fit into 91 3 times, resulting in a remainder of 22.
The next digit of our result is 3. 
Result so far: 28923.0
Subtracting 69 from 91 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.

Step 7:
The number 23 fits into 220 9 times, leaving a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 28923.9
Subtract 207 from 220 to 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 8:
The number 23 fits into 130 5 times, leaving a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 28923.95
If we subtract 115 from 130, we 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.

Step 9:
150 divided by 23 is 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 28923.956
Subtract 138 from 150 to 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.

Let's proceed to step 10:
If we divide 120 by 23, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 28923.9565
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.

Advancing to step 11:
50 divided by 23 is 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 28923.95652
Subtracting 46 from 50 leaves us with 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 12:
If we divide 40 by 23, we get 1 and a remainder of 17.
The next digit of our result is 1. 
Result so far: 28923.956521
Deduct 23 from 40 and we're left 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.

Advancing to step 13:
23 can be fit into 170 7 times, resulting in a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 28923.9565217
Subtracting 161 from 170 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 14:
90 divided by 23 is 3 with a remainder of 21.
The next digit of our result is 3. 
Result so far: 28923.95652173
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.

Our division results in 28923.95652173 with a remaining 2.1e-08.