303943 ÷ 23 
The aim is to understand the frequency of 23 in 303943.

Step 1:
3 divided by 23 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 23

Advancing to step 2:
23 can be fit into 30 1 times, resulting in a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 7 after subtracting 23 from 30.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 23

Going ahead to step 3:
The number 23 fits into 73 3 times, leaving a remainder of 4.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 69 from 73 and we're left with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 23

Advancing to step 4:
23 goes into 49 2 times with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 132.0
Deduct 46 from 49 and we're left with 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 23

Going ahead to step 5:
If we divide 34 by 23, we get 1 and a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 1321.0
Subtract 23 from 34 to get 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 23

Moving on to step 6:
The number 23 fits into 113 4 times, leaving a remainder of 21.
Write down 4 as next digit of the result. 
Result so far: 13214.0
The remainder is 21 after subtracting 92 from 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 7:
23 can be fit into 210 9 times, resulting in a remainder of 3.
The next digit of our result is 9. 
Result so far: 13214.9
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.

Advancing to step 8:
30 divided by 23 is 1 with a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 13214.91
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.

Going ahead to step 9:
If we divide 70 by 23, we get 3 and a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 13214.913
If we subtract 69 from 70, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 10:
The number 23 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 13214.913
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
If we divide 100 by 23, we get 4 and a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 13214.91304
Deduct 92 from 100 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
If we divide 80 by 23, we get 3 and a remainder of 11.
The next digit of our result is 3. 
Result so far: 13214.913043
Subtract 69 from 80 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 13:
23 can be fit into 110 4 times, resulting in a remainder of 18.
Record the quotient 4 as the next digit in the result. 
Result so far: 13214.9130434
Subtracting 92 from 110 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 14:
If we divide 180 by 23, we get 7 and a remainder of 19.
The number 7 becomes the next digit in our result. 
Result so far: 13214.91304347
If we take 161 away from 180, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

After the division, we end up with 13214.91304347 and a remainder of 1.9e-08.