We look at the division of 312819 by 23 
The aim is to understand the frequency of 23 in 312819.

Going ahead to step 1:
3 divided by 23 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 23

Going ahead to step 2:
The number 23 fits into 31 1 times, leaving a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 23 from 31 leaves us with 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 23

Going ahead to step 3:
23 can be fit into 82 3 times, resulting in a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtract 69 from 82 to get 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 23

Advancing to step 4:
23 goes into 138 6 times with a remainder of 0.
The next digit of our result is 6. 
Result so far: 136.0
Subtract 138 from 138 to get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 23

Moving on to step 5:
The number 23 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 1360.0
If we take 0 away from 1, we end up with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 23

On to step 6:
If we divide 19 by 23, we get 0 and a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 13600.0
If we subtract 0 from 19, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
23 goes into 190 8 times with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 13600.8
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.

On to step 8:
If we divide 60 by 23, we get 2 and a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 13600.82
Subtract 46 from 60 to get 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 9:
If we divide 140 by 23, we get 6 and a remainder of 2.
The next digit of our result is 6. 
Result so far: 13600.826
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.

Let's proceed to step 10:
20 divided by 23 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 13600.826
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 11:
23 can be fit into 200 8 times, resulting in a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 13600.82608
The remainder is 16 after subtracting 184 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 12:
160 divided by 23 is 6 with a remainder of 22.
The next digit of our result is 6. 
Result so far: 13600.826086
If we take 138 away from 160, we end up 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.

Going ahead to step 13:
If we divide 220 by 23, we get 9 and a remainder of 13.
Record the quotient 9 as the next digit in the result. 
Result so far: 13600.8260869
Subtracting 207 from 220 leaves us with 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 14:
23 goes into 130 5 times with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 13600.82608695
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.

Our division results in 13600.82608695 with a remaining 1.5e-08.