9909287 ÷ 404 
The aim is to understand the frequency of 404 in 9909287.

Let's proceed to step 1:
When dividing 9 by 404, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 404

Step 2:
404 can be fit into 99 0 times, resulting in a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 99 after subtracting 0 from 99.
Take the next digit (0) from the dividend and append it to 99, then repeat: 990 / 404

On to step 3:
404 goes into 990 2 times with a remainder of 182.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 808 from 990 and we're left with 182.
Append the next digit (9) from the dividend to 182 and continue with: 1829 / 404

Advancing to step 4:
The number 404 fits into 1829 4 times, leaving a remainder of 213.
The number 4 becomes the next digit in our result. 
Result so far: 24.0
Subtract 1616 from 1829 to get 213.
Bring next digit (2) of the dividend behind the 213 and repeat the process: 2132 / 404

On to step 5:
If we divide 2132 by 404, we get 5 and a remainder of 112.
The next digit of our result is 5. 
Result so far: 245.0
The remainder is 112 after subtracting 2020 from 2132.
Bring next digit (8) of the dividend behind the 112 and repeat the process: 1128 / 404

Going ahead to step 6:
The number 404 fits into 1128 2 times, leaving a remainder of 320.
The next digit of our result is 2. 
Result so far: 2452.0
The remainder is 320 after subtracting 808 from 1128.
Bring next digit (7) of the dividend behind the 320 and repeat the process: 3207 / 404

On to step 7:
If we divide 3207 by 404, we get 7 and a remainder of 379.
Use 7 as the next digit of our solution. 
Result so far: 24527.0
Deduct 2828 from 3207 and we're left with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Advancing to step 8:
The number 404 fits into 3790 9 times, leaving a remainder of 154.
Put 9 as the next digit of the answer. 
Result so far: 24527.9
Subtracting 3636 from 3790 leaves us with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

On to step 9:
404 can be fit into 1540 3 times, resulting in a remainder of 328.
The next digit of our result is 3. 
Result so far: 24527.93
If we take 1212 away from 1540, we end up with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Going ahead to step 10:
When dividing 3280 by 404, we get 8 with a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 24527.938
Subtract 3232 from 3280 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 11:
If we divide 480 by 404, we get 1 and a remainder of 76.
Record the quotient 1 as the next digit in the result. 
Result so far: 24527.9381
If we take 404 away from 480, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 12:
If we divide 760 by 404, we get 1 and a remainder of 356.
Record the quotient 1 as the next digit in the result. 
Result so far: 24527.93811
The remainder is 356 after subtracting 404 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

After the division, we end up with 24527.93811 and a remainder of 0.000356.