Let's divide 331148 by 90
The aim is to understand the frequency of 90 in 331148.

Advancing to step 1:
When dividing 3 by 90, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 90

Moving on to step 2:
When dividing 33 by 90, we get 0 with a remainder of 33.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 33 and we're left with 33.
Take the next digit (1) from the dividend and append it to 33, then repeat: 331 / 90

Step 3:
331 divided by 90 is 3 with a remainder of 61.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 270 from 331 leaves us with 61.
Take the next digit (1) from the dividend and append it to 61, then repeat: 611 / 90

Let's proceed to step 4:
If we divide 611 by 90, we get 6 and a remainder of 71.
Use 6 as the next digit of our solution. 
Result so far: 36.0
If we take 540 away from 611, we end up with 71.
Grab the next digit (4) from the dividend, add it to 71, then carry on: 714 / 90

Going ahead to step 5:
714 divided by 90 is 7 with a remainder of 84.
Record the quotient 7 as the next digit in the result. 
Result so far: 367.0
Deduct 630 from 714 and we're left with 84.
Bring next digit (8) of the dividend behind the 84 and repeat the process: 848 / 90

Step 6:
When dividing 848 by 90, we get 9 with a remainder of 38.
Record the quotient 9 as the next digit in the result. 
Result so far: 3679.0
Subtracting 810 from 848 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 7:
90 goes into 380 4 times with a remainder of 20.
The next digit of our result is 4. 
Result so far: 3679.4
Subtract 360 from 380 to 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.

Moving on to step 8:
200 divided by 90 is 2 with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 3679.42
Deduct 180 from 200 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
The number 90 fits into 200 2 times, leaving a remainder of 20.
The next digit of our result is 2. 
Result so far: 3679.422
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.

The final outcome is 3679.422, with a leftover of 0.002.