504894 ÷ 90 
The aim is to understand the frequency of 90 in 504894.

Step 1:
The number 90 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 90

Moving on to step 2:
If we divide 50 by 90, we get 0 and a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 50 after subtracting 0 from 50.
Append the next digit (4) from the dividend to 50 and continue with: 504 / 90

Going ahead to step 3:
The number 90 fits into 504 5 times, leaving a remainder of 54.
The next digit of our result is 5. 
Result so far: 5.0
If we take 450 away from 504, we end up with 54.
Grab the next digit (8) from the dividend, add it to 54, then carry on: 548 / 90

Moving on to step 4:
If we divide 548 by 90, we get 6 and a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 56.0
Deduct 540 from 548 and we're left with 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 90

Going ahead to step 5:
The number 90 fits into 89 0 times, leaving a remainder of 89.
Put 0 as the next digit of the answer. 
Result so far: 560.0
The remainder is 89 after subtracting 0 from 89.
Append the next digit (4) from the dividend to 89 and continue with: 894 / 90

Going ahead to step 6:
The number 90 fits into 894 9 times, leaving a remainder of 84.
Record the quotient 9 as the next digit in the result. 
Result so far: 5609.0
If we take 810 away from 894, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 7:
840 divided by 90 is 9 with a remainder of 30.
Record the quotient 9 as the next digit in the result. 
Result so far: 5609.9
Subtract 810 from 840 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
If we divide 300 by 90, we get 3 and a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 5609.93
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
90 goes into 300 3 times with a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 5609.933
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

In conclusion, the division gives 5609.933 with a balance of 0.003.