We're dividing 480045 by 90 
The aim is to understand the frequency of 90 in 480045.

On to step 1:
4 divided by 90 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 90

Step 2:
90 can be fit into 48 0 times, resulting in a remainder of 48.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 48, we end up with 48.
Take the next digit (0) from the dividend and append it to 48, then repeat: 480 / 90

Going ahead to step 3:
When dividing 480 by 90, we get 5 with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 450 from 480, we get 30.
Fetch the next digit (0) from the dividend, attach it to 30 and continue: 300 / 90

Going ahead to step 4:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
Deduct 270 from 300 and we're left with 30.
Grab the next digit (4) from the dividend, add it to 30, then carry on: 304 / 90

On to step 5:
When dividing 304 by 90, we get 3 with a remainder of 34.
Put 3 as the next digit of the answer. 
Result so far: 533.0
Deduct 270 from 304 and we're left with 34.
Grab the next digit (5) from the dividend, add it to 34, then carry on: 345 / 90

Let's proceed to step 6:
If we divide 345 by 90, we get 3 and a remainder of 75.
Write down 3 as next digit of the result. 
Result so far: 5333.0
If we subtract 270 from 345, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 7:
750 divided by 90 is 8 with a remainder of 30.
Use 8 as the next digit of our solution. 
Result so far: 5333.8
Subtracting 720 from 750 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
If we divide 300 by 90, we get 3 and a remainder of 30.
The next digit of our result is 3. 
Result so far: 5333.83
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 9:
90 goes into 300 3 times with a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 5333.833
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 5333.833 with a remainder of 0.003.