We look at the division of 332177 by 90 
The aim is to understand the frequency of 90 in 332177.

Step 1:
3 divided by 90 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 90

Step 2:
If we divide 33 by 90, we get 0 and a remainder of 33.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 33 leaves us with 33.
Fetch the next digit (2) from the dividend, attach it to 33 and continue: 332 / 90

Moving on to step 3:
If we divide 332 by 90, we get 3 and a remainder of 62.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 62 after subtracting 270 from 332.
Bring next digit (1) of the dividend behind the 62 and repeat the process: 621 / 90

Moving on to step 4:
90 can be fit into 621 6 times, resulting in a remainder of 81.
Put 6 as the next digit of the answer. 
Result so far: 36.0
If we subtract 540 from 621, we get 81.
Include the next digit (7) from the dividend after 81, then repeat: 817 / 90

Moving on to step 5:
If we divide 817 by 90, we get 9 and a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 369.0
Subtracting 810 from 817 leaves us with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 90

Let's proceed to step 6:
When dividing 77 by 90, we get 0 with a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 3690.0
If we subtract 0 from 77, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Step 7:
90 can be fit into 770 8 times, resulting in a remainder of 50.
Use 8 as the next digit of our solution. 
Result so far: 3690.8
Subtract 720 from 770 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.

Step 8:
90 can be fit into 500 5 times, resulting in a remainder of 50.
The next digit of our result is 5. 
Result so far: 3690.85
If we take 450 away from 500, we end up with 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 9:
The number 90 fits into 500 5 times, leaving a remainder of 50.
The next digit of our result is 5. 
Result so far: 3690.855
If we take 450 away from 500, we end up with 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 3690.855 and a remainder of 0.005.