We look at the division of 132633 by 90 
The aim is to understand the frequency of 90 in 132633.

Step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 90

On to step 2:
13 divided by 90 is 0 with a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Include the next digit (2) from the dividend after 13, then repeat: 132 / 90

Advancing to step 3:
90 can be fit into 132 1 times, resulting in a remainder of 42.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 90 from 132 and we're left with 42.
Include the next digit (6) from the dividend after 42, then repeat: 426 / 90

On to step 4:
If we divide 426 by 90, we get 4 and a remainder of 66.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 360 from 426, we get 66.
Bring next digit (3) of the dividend behind the 66 and repeat the process: 663 / 90

Moving on to step 5:
If we divide 663 by 90, we get 7 and a remainder of 33.
Write down 7 as next digit of the result. 
Result so far: 147.0
If we take 630 away from 663, we end up with 33.
Grab the next digit (3) from the dividend, add it to 33, then carry on: 333 / 90

On to step 6:
The number 90 fits into 333 3 times, leaving a remainder of 63.
The next digit of our result is 3. 
Result so far: 1473.0
If we take 270 away from 333, we end up with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 7:
90 can be fit into 630 7 times, resulting in a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 1473.7
If we take 630 away from 630, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
The number 90 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1473.7
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
90 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1473.7
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 1473.7 with a remainder of 0.0.