287904 ÷ 30 
The aim is to understand the frequency of 30 in 287904.

Let's proceed to step 1:
2 divided by 30 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 30

Let's proceed to step 2:
30 can be fit into 28 0 times, resulting in a remainder of 28.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Append the next digit (7) from the dividend to 28 and continue with: 287 / 30

Step 3:
287 divided by 30 is 9 with a remainder of 17.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 270 from 287 to get 17.
Bring next digit (9) of the dividend behind the 17 and repeat the process: 179 / 30

Advancing to step 4:
30 goes into 179 5 times with a remainder of 29.
Use 5 as the next digit of our solution. 
Result so far: 95.0
If we take 150 away from 179, we end up with 29.
Include the next digit (0) from the dividend after 29, then repeat: 290 / 30

Let's proceed to step 5:
When dividing 290 by 30, we get 9 with a remainder of 20.
Use 9 as the next digit of our solution. 
Result so far: 959.0
Subtracting 270 from 290 leaves us with 20.
Take the next digit (4) from the dividend and append it to 20, then repeat: 204 / 30

Advancing to step 6:
If we divide 204 by 30, we get 6 and a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 9596.0
Deduct 180 from 204 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 7:
30 can be fit into 240 8 times, resulting in a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 9596.8
Deduct 240 from 240 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
30 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 9596.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
30 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 9596.8
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 9596.8 and a remainder of 0.0.