Let's divide 525822 by 90
The aim is to understand the frequency of 90 in 525822.

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
Deduct 0 from 5 and we're left with 5.
Append the next digit (2) from the dividend to 5 and continue with: 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
If we take 0 away from 52, we end up with 52.
Take the next digit (5) from the dividend and append it to 52, then repeat: 525 / 90

Advancing to step 3:
525 divided by 90 is 5 with a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 450 away from 525, we end up with 75.
Fetch the next digit (8) from the dividend, attach it to 75 and continue: 758 / 90

Step 4:
90 can be fit into 758 8 times, resulting in a remainder of 38.
Put 8 as the next digit of the answer. 
Result so far: 58.0
The remainder is 38 after subtracting 720 from 758.
Bring next digit (2) of the dividend behind the 38 and repeat the process: 382 / 90

Advancing to step 5:
382 divided by 90 is 4 with a remainder of 22.
Use 4 as the next digit of our solution. 
Result so far: 584.0
Subtract 360 from 382 to get 22.
Include the next digit (2) from the dividend after 22, then repeat: 222 / 90

Let's proceed to step 6:
The number 90 fits into 222 2 times, leaving a remainder of 42.
Use 2 as the next digit of our solution. 
Result so far: 5842.0
Subtract 180 from 222 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 7:
If we divide 420 by 90, we get 4 and a remainder of 60.
The number 4 becomes the next digit in our result. 
Result so far: 5842.4
The remainder is 60 after subtracting 360 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
600 divided by 90 is 6 with a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 5842.46
Deduct 540 from 600 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
The number 90 fits into 600 6 times, leaving a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 5842.466
Subtract 540 from 600 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Our division results in 5842.466 with a remaining 0.006.