We're dividing 29709994 by 409 
The aim is to understand the frequency of 409 in 29709994.

Let's proceed to step 1:
The number 409 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 409

Going ahead to step 2:
29 divided by 409 is 0 with a remainder of 29.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 29 after subtracting 0 from 29.
Grab the next digit (7) from the dividend, add it to 29, then carry on: 297 / 409

On to step 3:
The number 409 fits into 297 0 times, leaving a remainder of 297.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 297 leaves us with 297.
Append the next digit (0) from the dividend to 297 and continue with: 2970 / 409

Advancing to step 4:
409 goes into 2970 7 times with a remainder of 107.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 107 after subtracting 2863 from 2970.
Grab the next digit (9) from the dividend, add it to 107, then carry on: 1079 / 409

Advancing to step 5:
409 can be fit into 1079 2 times, resulting in a remainder of 261.
Use 2 as the next digit of our solution. 
Result so far: 72.0
The remainder is 261 after subtracting 818 from 1079.
Take the next digit (9) from the dividend and append it to 261, then repeat: 2619 / 409

Step 6:
If we divide 2619 by 409, we get 6 and a remainder of 165.
The number 6 becomes the next digit in our result. 
Result so far: 726.0
Deduct 2454 from 2619 and we're left with 165.
Fetch the next digit (9) from the dividend, attach it to 165 and continue: 1659 / 409

Advancing to step 7:
When dividing 1659 by 409, we get 4 with a remainder of 23.
Put 4 as the next digit of the answer. 
Result so far: 7264.0
The remainder is 23 after subtracting 1636 from 1659.
Bring next digit (4) of the dividend behind the 23 and repeat the process: 234 / 409

Advancing to step 8:
409 can be fit into 234 0 times, resulting in a remainder of 234.
Put 0 as the next digit of the answer. 
Result so far: 72640.0
Deduct 0 from 234 and we're left with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Going ahead to step 9:
409 goes into 2340 5 times with a remainder of 295.
Write down 5 as next digit of the result. 
Result so far: 72640.5
Subtract 2045 from 2340 to get 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Step 10:
The number 409 fits into 2950 7 times, leaving a remainder of 87.
The next digit of our result is 7. 
Result so far: 72640.57
If we take 2863 away from 2950, we end up with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 11:
When dividing 870 by 409, we get 2 with a remainder of 52.
The next digit of our result is 2. 
Result so far: 72640.572
Deduct 818 from 870 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 12:
The number 409 fits into 520 1 times, leaving a remainder of 111.
Record the quotient 1 as the next digit in the result. 
Result so far: 72640.5721
The remainder is 111 after subtracting 409 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Advancing to step 13:
When dividing 1110 by 409, we get 2 with a remainder of 292.
The next digit of our result is 2. 
Result so far: 72640.57212
If we subtract 818 from 1110, we get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Step 14:
The number 409 fits into 2920 7 times, leaving a remainder of 57.
The number 7 becomes the next digit in our result. 
Result so far: 72640.572127
If we subtract 2863 from 2920, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 15:
409 can be fit into 570 1 times, resulting in a remainder of 161.
The number 1 becomes the next digit in our result. 
Result so far: 72640.5721271
Subtract 409 from 570 to get 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Let's proceed to step 16:
The number 409 fits into 1610 3 times, leaving a remainder of 383.
Use 3 as the next digit of our solution. 
Result so far: 72640.57212713
Subtracting 1227 from 1610 leaves us with 383.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

The final outcome is 72640.57212713, with a leftover of 3.83e-07.