We look at the division of 299335 by 90 
The aim is to understand the frequency of 90 in 299335.

Let's proceed to step 1:
2 divided by 90 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 90

Advancing to step 2:
90 can be fit into 29 0 times, resulting in a remainder of 29.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 29, we end up with 29.
Bring next digit (9) of the dividend behind the 29 and repeat the process: 299 / 90

Going ahead to step 3:
299 divided by 90 is 3 with a remainder of 29.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 270 from 299 leaves us with 29.
Fetch the next digit (3) from the dividend, attach it to 29 and continue: 293 / 90

Let's proceed to step 4:
293 divided by 90 is 3 with a remainder of 23.
Record the quotient 3 as the next digit in the result. 
Result so far: 33.0
Deduct 270 from 293 and we're left with 23.
Append the next digit (3) from the dividend to 23 and continue with: 233 / 90

Advancing to step 5:
If we divide 233 by 90, we get 2 and a remainder of 53.
The next digit of our result is 2. 
Result so far: 332.0
Subtract 180 from 233 to get 53.
Fetch the next digit (5) from the dividend, attach it to 53 and continue: 535 / 90

Step 6:
90 goes into 535 5 times with a remainder of 85.
Write down 5 as next digit of the result. 
Result so far: 3325.0
Subtracting 450 from 535 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 7:
850 divided by 90 is 9 with a remainder of 40.
Put 9 as the next digit of the answer. 
Result so far: 3325.9
The remainder is 40 after subtracting 810 from 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 3325.94
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 9:
If we divide 400 by 90, we get 4 and a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 3325.944
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 3325.944 and a remainder of 0.004.