Let's divide 28242605 by 409
The aim is to understand the frequency of 409 in 28242605.

Step 1:
When dividing 2 by 409, we get 0 with 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.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 409

Going ahead to step 2:
If we divide 28 by 409, we get 0 and a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 28 leaves us with 28.
Bring next digit (2) of the dividend behind the 28 and repeat the process: 282 / 409

Advancing to step 3:
282 divided by 409 is 0 with a remainder of 282.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 282, we end up with 282.
Grab the next digit (4) from the dividend, add it to 282, then carry on: 2824 / 409

Going ahead to step 4:
When dividing 2824 by 409, we get 6 with a remainder of 370.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 370 after subtracting 2454 from 2824.
Bring next digit (2) of the dividend behind the 370 and repeat the process: 3702 / 409

On to step 5:
409 can be fit into 3702 9 times, resulting in a remainder of 21.
The next digit of our result is 9. 
Result so far: 69.0
Deduct 3681 from 3702 and we're left with 21.
Grab the next digit (6) from the dividend, add it to 21, then carry on: 216 / 409

Advancing to step 6:
216 divided by 409 is 0 with a remainder of 216.
The next digit of our result is 0. 
Result so far: 690.0
If we take 0 away from 216, we end up with 216.
Append the next digit (0) from the dividend to 216 and continue with: 2160 / 409

Step 7:
2160 divided by 409 is 5 with a remainder of 115.
Write down 5 as next digit of the result. 
Result so far: 6905.0
Subtracting 2045 from 2160 leaves us with 115.
Bring next digit (5) of the dividend behind the 115 and repeat the process: 1155 / 409

Moving on to step 8:
409 goes into 1155 2 times with a remainder of 337.
The next digit of our result is 2. 
Result so far: 69052.0
Subtract 818 from 1155 to get 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Going ahead to step 9:
If we divide 3370 by 409, we get 8 and a remainder of 98.
Use 8 as the next digit of our solution. 
Result so far: 69052.8
The remainder is 98 after subtracting 3272 from 3370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 10:
980 divided by 409 is 2 with a remainder of 162.
The number 2 becomes the next digit in our result. 
Result so far: 69052.82
The remainder is 162 after subtracting 818 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

On to step 11:
When dividing 1620 by 409, we get 3 with a remainder of 393.
The number 3 becomes the next digit in our result. 
Result so far: 69052.823
If we subtract 1227 from 1620, we get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Going ahead to step 12:
When dividing 3930 by 409, we get 9 with a remainder of 249.
The number 9 becomes the next digit in our result. 
Result so far: 69052.8239
If we take 3681 away from 3930, we end up with 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Advancing to step 13:
When dividing 2490 by 409, we get 6 with a remainder of 36.
The next digit of our result is 6. 
Result so far: 69052.82396
If we subtract 2454 from 2490, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 14:
When dividing 360 by 409, we get 0 with a remainder of 360.
The number 0 becomes the next digit in our result. 
Result so far: 69052.82396
Subtract 0 from 360 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 15:
When dividing 3600 by 409, we get 8 with a remainder of 328.
Use 8 as the next digit of our solution. 
Result so far: 69052.8239608
Deduct 3272 from 3600 and we're left 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.

Advancing to step 16:
If we divide 3280 by 409, we get 8 and a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 69052.82396088
Subtracting 3272 from 3280 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 69052.82396088 with a remainder of 8e-09.