We're dividing 153383 by 90 
The aim is to understand the frequency of 90 in 153383.

Going ahead to step 1:
90 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 90

Step 2:
If we divide 15 by 90, we get 0 and a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 90

Advancing to step 3:
90 goes into 153 1 times with a remainder of 63.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 90 from 153 and we're left with 63.
Take the next digit (3) from the dividend and append it to 63, then repeat: 633 / 90

Moving on to step 4:
633 divided by 90 is 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we take 630 away from 633, we end up with 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 90

Let's proceed to step 5:
90 can be fit into 38 0 times, resulting in a remainder of 38.
Put 0 as the next digit of the answer. 
Result so far: 170.0
If we subtract 0 from 38, we get 38.
Grab the next digit (3) from the dividend, add it to 38, then carry on: 383 / 90

Going ahead to step 6:
90 goes into 383 4 times with a remainder of 23.
Record the quotient 4 as the next digit in the result. 
Result so far: 1704.0
Subtracting 360 from 383 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 7:
The number 90 fits into 230 2 times, leaving a remainder of 50.
Use 2 as the next digit of our solution. 
Result so far: 1704.2
If we subtract 180 from 230, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
90 goes into 500 5 times with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 1704.25
The remainder is 50 after subtracting 450 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 9:
If we divide 500 by 90, we get 5 and a remainder of 50.
The next digit of our result is 5. 
Result so far: 1704.255
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final result is 1704.255 with a remainder of 0.005.