Let's divide 28784669 by 409
The aim is to understand the frequency of 409 in 28784669.

Advancing to step 1:
The number 409 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 409

Moving on to step 2:
When dividing 28 by 409, we get 0 with a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 28 after subtracting 0 from 28.
Append the next digit (7) from the dividend to 28 and continue with: 287 / 409

Step 3:
287 divided by 409 is 0 with a remainder of 287.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 287 and we're left with 287.
Take the next digit (8) from the dividend and append it to 287, then repeat: 2878 / 409

Step 4:
If we divide 2878 by 409, we get 7 and a remainder of 15.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 2863 from 2878 to get 15.
Fetch the next digit (4) from the dividend, attach it to 15 and continue: 154 / 409

On to step 5:
154 divided by 409 is 0 with a remainder of 154.
Record the quotient 0 as the next digit in the result. 
Result so far: 70.0
If we subtract 0 from 154, we get 154.
Bring next digit (6) of the dividend behind the 154 and repeat the process: 1546 / 409

Step 6:
If we divide 1546 by 409, we get 3 and a remainder of 319.
The number 3 becomes the next digit in our result. 
Result so far: 703.0
Subtracting 1227 from 1546 leaves us with 319.
Include the next digit (6) from the dividend after 319, then repeat: 3196 / 409

Step 7:
409 can be fit into 3196 7 times, resulting in a remainder of 333.
Write down 7 as next digit of the result. 
Result so far: 7037.0
If we take 2863 away from 3196, we end up with 333.
Take the next digit (9) from the dividend and append it to 333, then repeat: 3339 / 409

On to step 8:
The number 409 fits into 3339 8 times, leaving a remainder of 67.
The next digit of our result is 8. 
Result so far: 70378.0
Subtracting 3272 from 3339 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 9:
When dividing 670 by 409, we get 1 with a remainder of 261.
Put 1 as the next digit of the answer. 
Result so far: 70378.1
Subtract 409 from 670 to get 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Going ahead to step 10:
The number 409 fits into 2610 6 times, leaving a remainder of 156.
Put 6 as the next digit of the answer. 
Result so far: 70378.16
Subtract 2454 from 2610 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Step 11:
If we divide 1560 by 409, we get 3 and a remainder of 333.
Put 3 as the next digit of the answer. 
Result so far: 70378.163
Subtracting 1227 from 1560 leaves us with 333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

On to step 12:
3330 divided by 409 is 8 with a remainder of 58.
The number 8 becomes the next digit in our result. 
Result so far: 70378.1638
Subtract 3272 from 3330 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 13:
The number 409 fits into 580 1 times, leaving a remainder of 171.
The next digit of our result is 1. 
Result so far: 70378.16381
Subtract 409 from 580 to get 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Going ahead to step 14:
409 can be fit into 1710 4 times, resulting in a remainder of 74.
The number 4 becomes the next digit in our result. 
Result so far: 70378.163814
If we subtract 1636 from 1710, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 15:
If we divide 740 by 409, we get 1 and a remainder of 331.
Put 1 as the next digit of the answer. 
Result so far: 70378.1638141
The remainder is 331 after subtracting 409 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Going ahead to step 16:
When dividing 3310 by 409, we get 8 with a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 70378.16381418
Subtract 3272 from 3310 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Our division results in 70378.16381418 with a remaining 3.8e-08.