We look at the division of 543930 by 23 
The aim is to understand the frequency of 23 in 543930.

On to step 1:
If we divide 5 by 23, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 23

Advancing to step 2:
23 goes into 54 2 times with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 46 from 54 leaves us with 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 23

Step 3:
The number 23 fits into 83 3 times, leaving a remainder of 14.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we take 69 away from 83, we end up with 14.
Take the next digit (9) from the dividend and append it to 14, then repeat: 149 / 23

Moving on to step 4:
23 goes into 149 6 times with a remainder of 11.
Put 6 as the next digit of the answer. 
Result so far: 236.0
Subtract 138 from 149 to get 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 23

Advancing to step 5:
The number 23 fits into 113 4 times, leaving a remainder of 21.
Use 4 as the next digit of our solution. 
Result so far: 2364.0
The remainder is 21 after subtracting 92 from 113.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 23

Moving on to step 6:
210 divided by 23 is 9 with a remainder of 3.
The next digit of our result is 9. 
Result so far: 23649.0
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 7:
23 can be fit into 30 1 times, resulting in a remainder of 7.
The next digit of our result is 1. 
Result so far: 23649.1
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.

Advancing to step 8:
When dividing 70 by 23, we get 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 23649.13
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.

Moving on to step 9:
When dividing 10 by 23, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 23649.13
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.

Moving on to step 10:
If we divide 100 by 23, we get 4 and a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 23649.1304
Subtract 92 from 100 to get 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 11:
When dividing 80 by 23, we get 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 23649.13043
Subtracting 69 from 80 leaves us with 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 12:
23 goes into 110 4 times with a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 23649.130434
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 13:
The number 23 fits into 180 7 times, leaving a remainder of 19.
The number 7 becomes the next digit in our result. 
Result so far: 23649.1304347
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 14:
When dividing 190 by 23, we get 8 with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 23649.13043478
Subtract 184 from 190 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

After the division, we end up with 23649.13043478 and a remainder of 6e-09.