990583 ÷ 30 
The aim is to understand the frequency of 30 in 990583.

Moving on to step 1:
The number 30 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 30

Let's proceed to step 2:
30 can be fit into 99 3 times, resulting in a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 90 from 99, we get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 30

On to step 3:
When dividing 90 by 30, we get 3 with a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 33.0
The remainder is 0 after subtracting 90 from 90.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 30

Let's proceed to step 4:
The number 30 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 330.0
If we take 0 away from 5, we end up with 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 30

Let's proceed to step 5:
58 divided by 30 is 1 with a remainder of 28.
Put 1 as the next digit of the answer. 
Result so far: 3301.0
If we subtract 30 from 58, we get 28.
Include the next digit (3) from the dividend after 28, then repeat: 283 / 30

On to step 6:
30 goes into 283 9 times with a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 33019.0
If we take 270 away from 283, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
When dividing 130 by 30, we get 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 33019.4
Deduct 120 from 130 and we're left 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.

Let's proceed to step 8:
100 divided by 30 is 3 with a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 33019.43
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
30 goes into 100 3 times with a remainder of 10.
The next digit of our result is 3. 
Result so far: 33019.433
Deduct 90 from 100 and we're left 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.

Our division results in 33019.433 with a remaining 0.001.