Let's divide 280551 by 990
The aim is to understand the frequency of 990 in 280551.

On to step 1:
The number 990 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 990

Step 2:
28 divided by 990 is 0 with a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 28 leaves us with 28.
Include the next digit (0) from the dividend after 28, then repeat: 280 / 990

Moving on to step 3:
When dividing 280 by 990, we get 0 with a remainder of 280.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 280 to get 280.
Append the next digit (5) from the dividend to 280 and continue with: 2805 / 990

Advancing to step 4:
When dividing 2805 by 990, we get 2 with a remainder of 825.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 1980 from 2805 and we're left with 825.
Take the next digit (5) from the dividend and append it to 825, then repeat: 8255 / 990

Moving on to step 5:
990 can be fit into 8255 8 times, resulting in a remainder of 335.
Write down 8 as next digit of the result. 
Result so far: 28.0
Subtract 7920 from 8255 to get 335.
Fetch the next digit (1) from the dividend, attach it to 335 and continue: 3351 / 990

Going ahead to step 6:
990 can be fit into 3351 3 times, resulting in a remainder of 381.
The next digit of our result is 3. 
Result so far: 283.0
Subtracting 2970 from 3351 leaves us with 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3810, and continue the process.

Step 7:
3810 divided by 990 is 3 with a remainder of 840.
Use 3 as the next digit of our solution. 
Result so far: 283.3
Subtracting 2970 from 3810 leaves us with 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Moving on to step 8:
When dividing 8400 by 990, we get 8 with a remainder of 480.
Put 8 as the next digit of the answer. 
Result so far: 283.38
Subtract 7920 from 8400 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 9:
If we divide 4800 by 990, we get 4 and a remainder of 840.
Put 4 as the next digit of the answer. 
Result so far: 283.384
The remainder is 840 after subtracting 3960 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Going ahead to step 10:
8400 divided by 990 is 8 with a remainder of 480.
The next digit of our result is 8. 
Result so far: 283.3848
If we take 7920 away from 8400, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 11:
The number 990 fits into 4800 4 times, leaving a remainder of 840.
Record the quotient 4 as the next digit in the result. 
Result so far: 283.38484
The remainder is 840 after subtracting 3960 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Let's proceed to step 12:
When dividing 8400 by 990, we get 8 with a remainder of 480.
Use 8 as the next digit of our solution. 
Result so far: 283.384848
Deduct 7920 from 8400 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 13:
4800 divided by 990 is 4 with a remainder of 840.
The next digit of our result is 4. 
Result so far: 283.3848484
The remainder is 840 after subtracting 3960 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Let's proceed to step 14:
990 goes into 8400 8 times with a remainder of 480.
The next digit of our result is 8. 
Result so far: 283.38484848
Deduct 7920 from 8400 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Our division results in 283.38484848 with a remaining 4.8e-07.