We look at the division of 311909 by 23 
The aim is to understand the frequency of 23 in 311909.

Going ahead to step 1:
23 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 23

On to step 2:
23 can be fit into 31 1 times, resulting in a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 23 from 31 and we're left with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 23

Going ahead to step 3:
When dividing 81 by 23, we get 3 with a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 69 away from 81, we end up with 12.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 23

Step 4:
23 can be fit into 129 5 times, resulting in a remainder of 14.
Put 5 as the next digit of the answer. 
Result so far: 135.0
If we subtract 115 from 129, we get 14.
Grab the next digit (0) from the dividend, add it to 14, then carry on: 140 / 23

Advancing to step 5:
23 goes into 140 6 times with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 1356.0
Subtracting 138 from 140 leaves us with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 23

Step 6:
23 can be fit into 29 1 times, resulting in a remainder of 6.
The next digit of our result is 1. 
Result so far: 13561.0
If we take 23 away from 29, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
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: 13561.2
If we take 46 away from 60, we end up 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.

On to step 8:
The number 23 fits into 140 6 times, leaving a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 13561.26
The remainder is 2 after subtracting 138 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 9:
If we divide 20 by 23, we get 0 and a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 13561.26
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
200 divided by 23 is 8 with a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 13561.2608
Subtracting 184 from 200 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 11:
If we divide 160 by 23, we get 6 and a remainder of 22.
Use 6 as the next digit of our solution. 
Result so far: 13561.26086
Deduct 138 from 160 and we're left 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.

Advancing to step 12:
The number 23 fits into 220 9 times, leaving a remainder of 13.
Write down 9 as next digit of the result. 
Result so far: 13561.260869
The remainder is 13 after subtracting 207 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 13:
If we divide 130 by 23, we get 5 and a remainder of 15.
The next digit of our result is 5. 
Result so far: 13561.2608695
Subtracting 115 from 130 leaves us 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.

Advancing to step 14:
150 divided by 23 is 6 with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 13561.26086956
The remainder is 12 after subtracting 138 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 13561.26086956 and a remainder of 1.2e-08.