We divide 550283 by 90
The aim is to understand the frequency of 90 in 550283.

Advancing to step 1:
If we divide 5 by 90, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 90

Going ahead to step 2:
The number 90 fits into 55 0 times, leaving a remainder of 55.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Grab the next digit (0) from the dividend, add it to 55, then carry on: 550 / 90

Going ahead to step 3:
90 can be fit into 550 6 times, resulting in a remainder of 10.
The next digit of our result is 6. 
Result so far: 6.0
The remainder is 10 after subtracting 540 from 550.
Append the next digit (2) from the dividend to 10 and continue with: 102 / 90

Let's proceed to step 4:
The number 90 fits into 102 1 times, leaving a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 61.0
If we take 90 away from 102, we end up with 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 90

Advancing to step 5:
When dividing 128 by 90, we get 1 with a remainder of 38.
Write down 1 as next digit of the result. 
Result so far: 611.0
Subtract 90 from 128 to get 38.
Take the next digit (3) from the dividend and append it to 38, then repeat: 383 / 90

On to step 6:
90 goes into 383 4 times with a remainder of 23.
Write down 4 as next digit of the result. 
Result so far: 6114.0
Subtracting 360 from 383 leaves us 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.

Moving on to step 7:
90 can be fit into 230 2 times, resulting in a remainder of 50.
Use 2 as the next digit of our solution. 
Result so far: 6114.2
The remainder is 50 after subtracting 180 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
500 divided by 90 is 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 6114.25
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 9:
90 goes into 500 5 times with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 6114.255
If we subtract 450 from 500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

After the division, we end up with 6114.255 and a remainder of 0.005.