We look at the division of 325742 by 90 
The aim is to understand the frequency of 90 in 325742.

Advancing to step 1:
90 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 90

Let's proceed to step 2:
When dividing 32 by 90, we get 0 with a remainder of 32.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 32 after subtracting 0 from 32.
Grab the next digit (5) from the dividend, add it to 32, then carry on: 325 / 90

Step 3:
90 can be fit into 325 3 times, resulting in a remainder of 55.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 270 from 325, we get 55.
Bring next digit (7) of the dividend behind the 55 and repeat the process: 557 / 90

Going ahead to step 4:
557 divided by 90 is 6 with a remainder of 17.
Write down 6 as next digit of the result. 
Result so far: 36.0
If we subtract 540 from 557, we get 17.
Take the next digit (4) from the dividend and append it to 17, then repeat: 174 / 90

Step 5:
The number 90 fits into 174 1 times, leaving a remainder of 84.
Put 1 as the next digit of the answer. 
Result so far: 361.0
Subtract 90 from 174 to get 84.
Fetch the next digit (2) from the dividend, attach it to 84 and continue: 842 / 90

Step 6:
90 goes into 842 9 times with a remainder of 32.
Record the quotient 9 as the next digit in the result. 
Result so far: 3619.0
Subtract 810 from 842 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 7:
90 goes into 320 3 times with a remainder of 50.
Put 3 as the next digit of the answer. 
Result so far: 3619.3
If we subtract 270 from 320, 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.

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: 3619.35
If we subtract 450 from 500, 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.

Let's proceed to step 9:
500 divided by 90 is 5 with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 3619.355
If we subtract 450 from 500, 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.

After the division, we end up with 3619.355 and a remainder of 0.005.