We look at the division of 286428 by 23 
The aim is to understand the frequency of 23 in 286428.

Advancing to step 1:
The number 23 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 23

On to step 2:
23 goes into 28 1 times with a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 5 after subtracting 23 from 28.
Take the next digit (6) from the dividend and append it to 5, then repeat: 56 / 23

Step 3:
The number 23 fits into 56 2 times, leaving a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we take 46 away from 56, we end up with 10.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 23

Going ahead to step 4:
When dividing 104 by 23, we get 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 124.0
The remainder is 12 after subtracting 92 from 104.
Bring next digit (2) of the dividend behind the 12 and repeat the process: 122 / 23

Advancing to step 5:
If we divide 122 by 23, we get 5 and a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 1245.0
Subtract 115 from 122 to get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 23

Let's proceed to step 6:
When dividing 78 by 23, we get 3 with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 12453.0
The remainder is 9 after subtracting 69 from 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
23 goes into 90 3 times with a remainder of 21.
Record the quotient 3 as the next digit in the result. 
Result so far: 12453.3
If we subtract 69 from 90, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 8:
The number 23 fits into 210 9 times, leaving a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 12453.39
The remainder is 3 after subtracting 207 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 9:
30 divided by 23 is 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 12453.391
The remainder is 7 after subtracting 23 from 30.
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 10:
If we divide 70 by 23, we get 3 and a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 12453.3913
Subtract 69 from 70 to get 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 11:
If we divide 10 by 23, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 12453.3913
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.

Let's proceed to step 12:
23 can be fit into 100 4 times, resulting in a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 12453.391304
Deduct 92 from 100 and we're left 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.

On to step 13:
The number 23 fits into 80 3 times, leaving a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 12453.3913043
If we take 69 away from 80, we end up 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.

Going ahead to step 14:
23 goes into 110 4 times with a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 12453.39130434
If we subtract 92 from 110, we 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.

The quotient of the division is 12453.39130434, and the remainder is 1.8e-08.