We're dividing 500943 by 90 
The aim is to understand the frequency of 90 in 500943.

Going ahead to step 1:
When dividing 5 by 90, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 90

On to step 2:
50 divided by 90 is 0 with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 50, we end up with 50.
Fetch the next digit (0) from the dividend, attach it to 50 and continue: 500 / 90

Moving on to step 3:
When dividing 500 by 90, we get 5 with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 450 from 500, we get 50.
Append the next digit (9) from the dividend to 50 and continue with: 509 / 90

Moving on to step 4:
509 divided by 90 is 5 with a remainder of 59.
Put 5 as the next digit of the answer. 
Result so far: 55.0
If we subtract 450 from 509, we get 59.
Take the next digit (4) from the dividend and append it to 59, then repeat: 594 / 90

Step 5:
594 divided by 90 is 6 with a remainder of 54.
Put 6 as the next digit of the answer. 
Result so far: 556.0
If we subtract 540 from 594, we get 54.
Take the next digit (3) from the dividend and append it to 54, then repeat: 543 / 90

Going ahead to step 6:
The number 90 fits into 543 6 times, leaving a remainder of 3.
The number 6 becomes the next digit in our result. 
Result so far: 5566.0
Deduct 540 from 543 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
When dividing 30 by 90, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 5566.0
Subtract 0 from 30 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.

Let's proceed to step 8:
The number 90 fits into 300 3 times, leaving a remainder of 30.
The next digit of our result is 3. 
Result so far: 5566.03
Deduct 270 from 300 and we're left 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.

Moving on to step 9:
When dividing 300 by 90, we get 3 with a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 5566.033
If we take 270 away from 300, we end up 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 5566.033 with a balance of 0.003.