We're dividing 23532 by 90 
The aim is to understand the frequency of 90 in 23532.

Step 1:
90 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 90

On to step 2:
23 divided by 90 is 0 with a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 23 to get 23.
Take the next digit (5) from the dividend and append it to 23, then repeat: 235 / 90

Step 3:
90 can be fit into 235 2 times, resulting in a remainder of 55.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 180 from 235, we get 55.
Take the next digit (3) from the dividend and append it to 55, then repeat: 553 / 90

Moving on to step 4:
90 can be fit into 553 6 times, resulting in a remainder of 13.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Subtract 540 from 553 to get 13.
Grab the next digit (2) from the dividend, add it to 13, then carry on: 132 / 90

On to step 5:
90 can be fit into 132 1 times, resulting in a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 261.0
The remainder is 42 after subtracting 90 from 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 6:
If we divide 420 by 90, we get 4 and a remainder of 60.
Record the quotient 4 as the next digit in the result. 
Result so far: 261.4
If we take 360 away from 420, we end up 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 7:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The next digit of our result is 6. 
Result so far: 261.46
If we subtract 540 from 600, we 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.

Step 8:
90 can be fit into 600 6 times, resulting in a remainder of 60.
Use 6 as the next digit of our solution. 
Result so far: 261.466
Subtracting 540 from 600 leaves us 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.

The quotient of the division is 261.466, and the remainder is 0.006.