Let's divide 283909 by 90
The aim is to understand the frequency of 90 in 283909.

Advancing to step 1:
When dividing 2 by 90, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 90

On to step 2:
The number 90 fits into 28 0 times, leaving a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 28 to get 28.
Fetch the next digit (3) from the dividend, attach it to 28 and continue: 283 / 90

On to step 3:
90 can be fit into 283 3 times, resulting in a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 270 from 283 to get 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 90

Advancing to step 4:
If we divide 139 by 90, we get 1 and a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 31.0
Deduct 90 from 139 and we're left with 49.
Bring next digit (0) of the dividend behind the 49 and repeat the process: 490 / 90

Advancing to step 5:
When dividing 490 by 90, we get 5 with a remainder of 40.
Record the quotient 5 as the next digit in the result. 
Result so far: 315.0
Deduct 450 from 490 and we're left with 40.
Fetch the next digit (9) from the dividend, attach it to 40 and continue: 409 / 90

Advancing to step 6:
When dividing 409 by 90, we get 4 with a remainder of 49.
The number 4 becomes the next digit in our result. 
Result so far: 3154.0
Deduct 360 from 409 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 7:
The number 90 fits into 490 5 times, leaving a remainder of 40.
The next digit of our result is 5. 
Result so far: 3154.5
If we subtract 450 from 490, we get 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 8:
If we divide 400 by 90, we get 4 and a remainder of 40.
The next digit of our result is 4. 
Result so far: 3154.54
Subtract 360 from 400 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
If we divide 400 by 90, we get 4 and a remainder of 40.
The next digit of our result is 4. 
Result so far: 3154.544
Deduct 360 from 400 and we're left 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.

In conclusion, the division gives 3154.544 with a balance of 0.004.