135983 divided by 23 
The aim is to understand the frequency of 23 in 135983.

Let's proceed to step 1:
When dividing 1 by 23, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 23

Step 2:
If we divide 13 by 23, we get 0 and a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 23

Moving on to step 3:
The number 23 fits into 135 5 times, leaving a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 5.0
The remainder is 20 after subtracting 115 from 135.
Include the next digit (9) from the dividend after 20, then repeat: 209 / 23

On to step 4:
If we divide 209 by 23, we get 9 and a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 59.0
Deduct 207 from 209 and we're left with 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 23

Going ahead to step 5:
23 goes into 28 1 times with a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 591.0
If we take 23 away from 28, we end up with 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 23

Advancing to step 6:
53 divided by 23 is 2 with a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 5912.0
If we subtract 46 from 53, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
When dividing 70 by 23, we get 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 5912.3
If we take 69 away from 70, we end up 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.

Step 8:
The number 23 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 5912.3
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.

Let's proceed to step 9:
23 can be fit into 100 4 times, resulting in a remainder of 8.
The next digit of our result is 4. 
Result so far: 5912.304
Subtracting 92 from 100 leaves us 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.

Step 10:
When dividing 80 by 23, we get 3 with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 5912.3043
The remainder is 11 after subtracting 69 from 80.
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 11:
23 can be fit into 110 4 times, resulting in a remainder of 18.
The next digit of our result is 4. 
Result so far: 5912.30434
Subtract 92 from 110 to 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.

On to step 12:
180 divided by 23 is 7 with a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 5912.304347
Subtracting 161 from 180 leaves us 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.

Advancing to step 13:
When dividing 190 by 23, we get 8 with a remainder of 6.
The next digit of our result is 8. 
Result so far: 5912.3043478
The remainder is 6 after subtracting 184 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 14:
When dividing 60 by 23, we get 2 with a remainder of 14.
The next digit of our result is 2. 
Result so far: 5912.30434782
Deduct 46 from 60 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 5912.30434782, with a leftover of 1.4e-08.