We look at the division of 379486 by 23 
The aim is to understand the frequency of 23 in 379486.

Advancing to step 1:
When dividing 3 by 23, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 23

On to step 2:
23 goes into 37 1 times with a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 23 away from 37, we end up with 14.
Grab the next digit (9) from the dividend, add it to 14, then carry on: 149 / 23

Moving on to step 3:
If we divide 149 by 23, we get 6 and a remainder of 11.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtracting 138 from 149 leaves us with 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 23

On to step 4:
When dividing 114 by 23, we get 4 with a remainder of 22.
Write down 4 as next digit of the result. 
Result so far: 164.0
If we subtract 92 from 114, we get 22.
Include the next digit (8) from the dividend after 22, then repeat: 228 / 23

Let's proceed to step 5:
The number 23 fits into 228 9 times, leaving a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 1649.0
If we subtract 207 from 228, we get 21.
Bring next digit (6) of the dividend behind the 21 and repeat the process: 216 / 23

Moving on to step 6:
If we divide 216 by 23, we get 9 and a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 16499.0
Deduct 207 from 216 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
90 divided by 23 is 3 with a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 16499.3
Deduct 69 from 90 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 8:
210 divided by 23 is 9 with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 16499.39
If we subtract 207 from 210, we 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.

Advancing to step 9:
If we divide 30 by 23, we get 1 and a remainder of 7.
The next digit of our result is 1. 
Result so far: 16499.391
Subtract 23 from 30 to 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.

Going ahead to step 10:
The number 23 fits into 70 3 times, leaving a remainder of 1.
The next digit of our result is 3. 
Result so far: 16499.3913
Subtracting 69 from 70 leaves us 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.

Moving on to step 11:
23 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 16499.3913
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.

Advancing to step 12:
The number 23 fits into 100 4 times, leaving a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 16499.391304
If we take 92 away from 100, we end up 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.

Going ahead to step 13:
23 goes into 80 3 times with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 16499.3913043
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.

Advancing to step 14:
When dividing 110 by 23, we get 4 with a remainder of 18.
Record the quotient 4 as the next digit in the result. 
Result so far: 16499.39130434
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.

After the division, we end up with 16499.39130434 and a remainder of 1.8e-08.