We look at the division of 459923 by 45 
The aim is to understand the frequency of 45 in 459923.

Let's proceed to step 1:
The number 45 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 45

Moving on to step 2:
If we divide 45 by 45, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 45 from 45 to get 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 45

Advancing to step 3:
9 divided by 45 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 45

Step 4:
99 divided by 45 is 2 with a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 102.0
Subtracting 90 from 99 leaves us with 9.
Fetch the next digit (2) from the dividend, attach it to 9 and continue: 92 / 45

Going ahead to step 5:
The number 45 fits into 92 2 times, leaving a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 1022.0
The remainder is 2 after subtracting 90 from 92.
Include the next digit (3) from the dividend after 2, then repeat: 23 / 45

On to step 6:
23 divided by 45 is 0 with a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 10220.0
If we take 0 away from 23, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 7:
If we divide 230 by 45, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 10220.5
If we subtract 225 from 230, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 8:
The number 45 fits into 50 1 times, leaving a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 10220.51
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 9:
45 goes into 50 1 times with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 10220.511
Subtract 45 from 50 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Our division results in 10220.511 with a remaining 0.0005.