Let's divide 239972 by 23
The aim is to understand the frequency of 23 in 239972.

Going ahead to step 1:
If we divide 2 by 23, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 23

On to step 2:
23 can be fit into 23 1 times, resulting in a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 23 from 23, we get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 23

Going ahead to step 3:
23 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 23

Advancing to step 4:
99 divided by 23 is 4 with a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 104.0
If we subtract 92 from 99, we get 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 23

On to step 5:
23 can be fit into 77 3 times, resulting in a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 1043.0
If we take 69 away from 77, we end up with 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 23

Going ahead to step 6:
When dividing 82 by 23, we get 3 with a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 10433.0
If we subtract 69 from 82, 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.

Let's proceed to step 7:
The number 23 fits into 130 5 times, leaving a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 10433.5
If we take 115 away from 130, we end up with 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 8:
When dividing 150 by 23, we get 6 with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 10433.56
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.

Going ahead to step 9:
If we divide 120 by 23, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 10433.565
If we subtract 115 from 120, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 10:
When dividing 50 by 23, we get 2 with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 10433.5652
The remainder is 4 after subtracting 46 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 11:
If we divide 40 by 23, we get 1 and a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 10433.56521
If we subtract 23 from 40, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 12:
When dividing 170 by 23, we get 7 with a remainder of 9.
The next digit of our result is 7. 
Result so far: 10433.565217
Subtract 161 from 170 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 13:
If we divide 90 by 23, we get 3 and a remainder of 21.
Record the quotient 3 as the next digit in the result. 
Result so far: 10433.5652173
If we subtract 69 from 90, 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.

Going ahead to step 14:
23 goes into 210 9 times with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 10433.56521739
Subtract 207 from 210 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final result is 10433.56521739 with a remainder of 3e-09.