135488 divided by 90 
The aim is to understand the frequency of 90 in 135488.

Advancing to step 1:
90 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 90

Step 2:
If we divide 13 by 90, we get 0 and a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 90

Moving on to step 3:
90 goes into 135 1 times with a remainder of 45.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 90 from 135 and we're left with 45.
Grab the next digit (4) from the dividend, add it to 45, then carry on: 454 / 90

Moving on to step 4:
454 divided by 90 is 5 with a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtract 450 from 454 to get 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 90

On to step 5:
The number 90 fits into 48 0 times, leaving a remainder of 48.
Write down 0 as next digit of the result. 
Result so far: 150.0
If we take 0 away from 48, we end up with 48.
Grab the next digit (8) from the dividend, add it to 48, then carry on: 488 / 90

Moving on to step 6:
When dividing 488 by 90, we get 5 with a remainder of 38.
Put 5 as the next digit of the answer. 
Result so far: 1505.0
Subtract 450 from 488 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 7:
When dividing 380 by 90, we get 4 with a remainder of 20.
The number 4 becomes the next digit in our result. 
Result so far: 1505.4
If we subtract 360 from 380, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
90 can be fit into 200 2 times, resulting in a remainder of 20.
The next digit of our result is 2. 
Result so far: 1505.42
If we subtract 180 from 200, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
90 goes into 200 2 times with a remainder of 20.
The next digit of our result is 2. 
Result so far: 1505.422
The remainder is 20 after subtracting 180 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 1505.422 with a balance of 0.002.