We look at the division of 2561239 by 990 
The aim is to understand the frequency of 990 in 2561239.

Going ahead to step 1:
If we divide 2 by 990, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 990

Moving on to step 2:
990 goes into 25 0 times with a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Append the next digit (6) from the dividend to 25 and continue with: 256 / 990

Step 3:
The number 990 fits into 256 0 times, leaving a remainder of 256.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 256 to get 256.
Append the next digit (1) from the dividend to 256 and continue with: 2561 / 990

Moving on to step 4:
990 goes into 2561 2 times with a remainder of 581.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 1980 from 2561 and we're left with 581.
Bring next digit (2) of the dividend behind the 581 and repeat the process: 5812 / 990

Advancing to step 5:
The number 990 fits into 5812 5 times, leaving a remainder of 862.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
Subtract 4950 from 5812 to get 862.
Append the next digit (3) from the dividend to 862 and continue with: 8623 / 990

Step 6:
8623 divided by 990 is 8 with a remainder of 703.
The next digit of our result is 8. 
Result so far: 258.0
Deduct 7920 from 8623 and we're left with 703.
Include the next digit (9) from the dividend after 703, then repeat: 7039 / 990

Going ahead to step 7:
7039 divided by 990 is 7 with a remainder of 109.
Put 7 as the next digit of the answer. 
Result so far: 2587.0
Subtracting 6930 from 7039 leaves us with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Let's proceed to step 8:
1090 divided by 990 is 1 with a remainder of 100.
Record the quotient 1 as the next digit in the result. 
Result so far: 2587.1
The remainder is 100 after subtracting 990 from 1090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 9:
1000 divided by 990 is 1 with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 2587.11
Subtracting 990 from 1000 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

In conclusion, the division gives 2587.11 with a balance of 0.01.