903539 ÷ 23 
The aim is to understand the frequency of 23 in 903539.

Step 1:
The number 23 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 23

Moving on to step 2:
90 divided by 23 is 3 with a remainder of 21.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 69 from 90, we get 21.
Take the next digit (3) from the dividend and append it to 21, then repeat: 213 / 23

On to step 3:
The number 23 fits into 213 9 times, leaving a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 39.0
Subtracting 207 from 213 leaves us with 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 23

On to step 4:
65 divided by 23 is 2 with a remainder of 19.
Record the quotient 2 as the next digit in the result. 
Result so far: 392.0
The remainder is 19 after subtracting 46 from 65.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 23

Advancing to step 5:
When dividing 193 by 23, we get 8 with a remainder of 9.
Record the quotient 8 as the next digit in the result. 
Result so far: 3928.0
Subtract 184 from 193 to get 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 23

Moving on to step 6:
If we divide 99 by 23, we get 4 and a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 39284.0
If we subtract 92 from 99, we 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.

Let's proceed to step 7:
23 can be fit into 70 3 times, resulting in a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 39284.3
Deduct 69 from 70 and we're left 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.

Step 8:
When dividing 10 by 23, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 39284.3
If we take 0 away from 10, we end up with 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 9:
The number 23 fits into 100 4 times, leaving a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 39284.304
The remainder is 8 after subtracting 92 from 100.
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 10:
When dividing 80 by 23, we get 3 with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 39284.3043
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.

Advancing to step 11:
When dividing 110 by 23, we get 4 with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 39284.30434
If we take 92 away from 110, we end up 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.

Moving on to step 12:
180 divided by 23 is 7 with a remainder of 19.
Put 7 as the next digit of the answer. 
Result so far: 39284.304347
Subtract 161 from 180 to 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.

On to step 13:
If we divide 190 by 23, we get 8 and a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 39284.3043478
Deduct 184 from 190 and we're left 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 14:
When dividing 60 by 23, we get 2 with a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 39284.30434782
Deduct 46 from 60 and we're left 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.

The final outcome is 39284.30434782, with a leftover of 1.4e-08.