528864 divided by 90 
The aim is to understand the frequency of 90 in 528864.

Step 1:
90 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 90

On to step 2:
The number 90 fits into 52 0 times, leaving a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 52 leaves us with 52.
Fetch the next digit (8) from the dividend, attach it to 52 and continue: 528 / 90

Going ahead to step 3:
90 can be fit into 528 5 times, resulting in a remainder of 78.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 450 from 528 and we're left with 78.
Fetch the next digit (8) from the dividend, attach it to 78 and continue: 788 / 90

Advancing to step 4:
788 divided by 90 is 8 with a remainder of 68.
Use 8 as the next digit of our solution. 
Result so far: 58.0
Subtracting 720 from 788 leaves us with 68.
Include the next digit (6) from the dividend after 68, then repeat: 686 / 90

Going ahead to step 5:
90 can be fit into 686 7 times, resulting in a remainder of 56.
Write down 7 as next digit of the result. 
Result so far: 587.0
Deduct 630 from 686 and we're left with 56.
Fetch the next digit (4) from the dividend, attach it to 56 and continue: 564 / 90

Moving on to step 6:
When dividing 564 by 90, we get 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 5876.0
The remainder is 24 after subtracting 540 from 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 7:
240 divided by 90 is 2 with a remainder of 60.
Put 2 as the next digit of the answer. 
Result so far: 5876.2
If we subtract 180 from 240, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 8:
90 goes into 600 6 times with a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 5876.26
If we subtract 540 from 600, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
600 divided by 90 is 6 with a remainder of 60.
The next digit of our result is 6. 
Result so far: 5876.266
If we take 540 away from 600, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

In conclusion, the division gives 5876.266 with a balance of 0.006.