We divide 497879 by 90
The aim is to understand the frequency of 90 in 497879.

Moving on to step 1:
4 divided by 90 is 0 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.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 90

On to step 2:
If we divide 49 by 90, we get 0 and a remainder of 49.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 49, we get 49.
Include the next digit (7) from the dividend after 49, then repeat: 497 / 90

Moving on to step 3:
90 goes into 497 5 times with a remainder of 47.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 450 from 497 leaves us with 47.
Grab the next digit (8) from the dividend, add it to 47, then carry on: 478 / 90

Step 4:
90 goes into 478 5 times with a remainder of 28.
Write down 5 as next digit of the result. 
Result so far: 55.0
If we take 450 away from 478, we end up with 28.
Take the next digit (7) from the dividend and append it to 28, then repeat: 287 / 90

Step 5:
90 can be fit into 287 3 times, resulting in a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 553.0
The remainder is 17 after subtracting 270 from 287.
Append the next digit (9) from the dividend to 17 and continue with: 179 / 90

Let's proceed to step 6:
90 can be fit into 179 1 times, resulting in a remainder of 89.
The number 1 becomes the next digit in our result. 
Result so far: 5531.0
Deduct 90 from 179 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 7:
90 can be fit into 890 9 times, resulting in a remainder of 80.
The next digit of our result is 9. 
Result so far: 5531.9
If we subtract 810 from 890, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 8:
The number 90 fits into 800 8 times, leaving a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 5531.98
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 9:
The number 90 fits into 800 8 times, leaving a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 5531.988
Subtracting 720 from 800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

In conclusion, the division gives 5531.988 with a balance of 0.008.