489088 ÷ 90 
The aim is to understand the frequency of 90 in 489088.

Going ahead to step 1:
90 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 90

Going ahead to step 2:
If we divide 48 by 90, we get 0 and a remainder of 48.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 48 after subtracting 0 from 48.
Bring next digit (9) of the dividend behind the 48 and repeat the process: 489 / 90

On to step 3:
If we divide 489 by 90, we get 5 and a remainder of 39.
The next digit of our result is 5. 
Result so far: 5.0
If we subtract 450 from 489, we get 39.
Include the next digit (0) from the dividend after 39, then repeat: 390 / 90

Advancing to step 4:
When dividing 390 by 90, we get 4 with a remainder of 30.
The number 4 becomes the next digit in our result. 
Result so far: 54.0
If we take 360 away from 390, we end up with 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 90

On to step 5:
90 can be fit into 308 3 times, resulting in a remainder of 38.
Write down 3 as next digit of the result. 
Result so far: 543.0
The remainder is 38 after subtracting 270 from 308.
Fetch the next digit (8) from the dividend, attach it to 38 and continue: 388 / 90

Moving on to step 6:
90 goes into 388 4 times with a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 5434.0
Subtract 360 from 388 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 7:
90 can be fit into 280 3 times, resulting in a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 5434.3
The remainder is 10 after subtracting 270 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
100 divided by 90 is 1 with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 5434.31
Subtracting 90 from 100 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.

Let's proceed to step 9:
When dividing 100 by 90, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 5434.311
Subtracting 90 from 100 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.

After the division, we end up with 5434.311 and a remainder of 0.001.