576504 ÷ 90 
The aim is to understand the frequency of 90 in 576504.

Moving on to step 1:
When dividing 5 by 90, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 90

Moving on to step 2:
90 can be fit into 57 0 times, resulting in a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Include the next digit (6) from the dividend after 57, then repeat: 576 / 90

Advancing to step 3:
90 can be fit into 576 6 times, resulting in a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 36 after subtracting 540 from 576.
Grab the next digit (5) from the dividend, add it to 36, then carry on: 365 / 90

Advancing to step 4:
365 divided by 90 is 4 with a remainder of 5.
Put 4 as the next digit of the answer. 
Result so far: 64.0
Subtracting 360 from 365 leaves us with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 90

On to step 5:
90 can be fit into 50 0 times, resulting in a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 640.0
Subtracting 0 from 50 leaves us with 50.
Take the next digit (4) from the dividend and append it to 50, then repeat: 504 / 90

On to step 6:
The number 90 fits into 504 5 times, leaving a remainder of 54.
Record the quotient 5 as the next digit in the result. 
Result so far: 6405.0
Subtract 450 from 504 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 7:
When dividing 540 by 90, we get 6 with a remainder of 0.
The next digit of our result is 6. 
Result so far: 6405.6
Deduct 540 from 540 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
90 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6405.6
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
0 divided by 90 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6405.6
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 6405.6, and the remainder is 0.0.