We're dividing 520312 by 90 
The aim is to understand the frequency of 90 in 520312.

Moving on to step 1:
90 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 90

Advancing to step 2:
90 goes into 52 0 times with a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 52 after subtracting 0 from 52.
Include the next digit (0) from the dividend after 52, then repeat: 520 / 90

On to step 3:
The number 90 fits into 520 5 times, leaving a remainder of 70.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 450 from 520 leaves us with 70.
Grab the next digit (3) from the dividend, add it to 70, then carry on: 703 / 90

Step 4:
90 can be fit into 703 7 times, resulting in a remainder of 73.
Record the quotient 7 as the next digit in the result. 
Result so far: 57.0
If we take 630 away from 703, we end up with 73.
Bring next digit (1) of the dividend behind the 73 and repeat the process: 731 / 90

Moving on to step 5:
90 can be fit into 731 8 times, resulting in a remainder of 11.
Record the quotient 8 as the next digit in the result. 
Result so far: 578.0
If we subtract 720 from 731, we get 11.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 90

Moving on to step 6:
If we divide 112 by 90, we get 1 and a remainder of 22.
Record the quotient 1 as the next digit in the result. 
Result so far: 5781.0
Subtracting 90 from 112 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 7:
90 goes into 220 2 times with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 5781.2
If we subtract 180 from 220, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 8:
90 can be fit into 400 4 times, resulting in a remainder of 40.
The next digit of our result is 4. 
Result so far: 5781.24
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 9:
When dividing 400 by 90, we get 4 with a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 5781.244
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

In conclusion, the division gives 5781.244 with a balance of 0.004.