Let's divide 576550 by 90
The aim is to understand the frequency of 90 in 576550.

Going ahead to step 1:
The number 90 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 90

Moving on to step 2:
When dividing 57 by 90, we get 0 with a remainder of 57.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 57 to get 57.
Bring next digit (6) of the dividend behind the 57 and repeat the process: 576 / 90

Moving on to step 3:
90 goes into 576 6 times with a remainder of 36.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 540 from 576 leaves us with 36.
Fetch the next digit (5) from the dividend, attach it to 36 and continue: 365 / 90

Advancing to step 4:
The number 90 fits into 365 4 times, leaving a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 64.0
Subtracting 360 from 365 leaves us with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 90

Let's proceed to step 5:
If we divide 55 by 90, we get 0 and a remainder of 55.
Put 0 as the next digit of the answer. 
Result so far: 640.0
If we take 0 away from 55, we end up with 55.
Grab the next digit (0) from the dividend, add it to 55, then carry on: 550 / 90

On to step 6:
550 divided by 90 is 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 6406.0
Subtracting 540 from 550 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
90 can be fit into 100 1 times, resulting in a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 6406.1
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
90 can be fit into 100 1 times, resulting in a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 6406.11
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 6406.11, and the remainder is 0.01.