We look at the division of 225020 by 45 
The aim is to understand the frequency of 45 in 225020.

Going ahead to step 1:
2 divided by 45 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 45

Step 2:
The number 45 fits into 22 0 times, leaving a remainder of 22.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 22 and we're left with 22.
Fetch the next digit (5) from the dividend, attach it to 22 and continue: 225 / 45

On to step 3:
45 goes into 225 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 225 from 225, we get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 45

Moving on to step 4:
The number 45 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 50.0
If we take 0 away from 0, we end up with 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 45

Advancing to step 5:
The number 45 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 500.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 45

Let's proceed to step 6:
45 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 5000.0
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 7:
200 divided by 45 is 4 with a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 5000.4
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
45 can be fit into 200 4 times, resulting in a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 5000.44
Subtracting 180 from 200 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 5000.44 with a remaining 0.02.