500020 divided by 45 
The aim is to understand the frequency of 45 in 500020.

Moving on to step 1:
5 divided by 45 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 45

Let's proceed to step 2:
45 can be fit into 50 1 times, resulting in a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 45 from 50, we get 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 45

Advancing to step 3:
When dividing 50 by 45, we get 1 with a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Deduct 45 from 50 and we're left with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 45

Going ahead to step 4:
45 goes into 50 1 times with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 111.0
Subtracting 45 from 50 leaves us with 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 45

Step 5:
The number 45 fits into 52 1 times, leaving a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 1111.0
The remainder is 7 after subtracting 45 from 52.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 45

Let's proceed to step 6:
The number 45 fits into 70 1 times, leaving a remainder of 25.
The next digit of our result is 1. 
Result so far: 11111.0
If we subtract 45 from 70, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 7:
The number 45 fits into 250 5 times, leaving a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 11111.5
The remainder is 25 after subtracting 225 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 8:
250 divided by 45 is 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 11111.55
If we subtract 225 from 250, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 11111.55 and a remainder of 0.025.