We look at the division of 28430571 by 649 
The aim is to understand the frequency of 649 in 28430571.

Let's proceed to step 1:
649 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 649

Going ahead to step 2:
The number 649 fits into 28 0 times, leaving a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 28 after subtracting 0 from 28.
Bring next digit (4) of the dividend behind the 28 and repeat the process: 284 / 649

On to step 3:
The number 649 fits into 284 0 times, leaving a remainder of 284.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 284 leaves us with 284.
Grab the next digit (3) from the dividend, add it to 284, then carry on: 2843 / 649

Advancing to step 4:
If we divide 2843 by 649, we get 4 and a remainder of 247.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 2596 from 2843 to get 247.
Fetch the next digit (0) from the dividend, attach it to 247 and continue: 2470 / 649

Let's proceed to step 5:
2470 divided by 649 is 3 with a remainder of 523.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Subtract 1947 from 2470 to get 523.
Append the next digit (5) from the dividend to 523 and continue with: 5235 / 649

On to step 6:
649 can be fit into 5235 8 times, resulting in a remainder of 43.
The number 8 becomes the next digit in our result. 
Result so far: 438.0
The remainder is 43 after subtracting 5192 from 5235.
Grab the next digit (7) from the dividend, add it to 43, then carry on: 437 / 649

Step 7:
If we divide 437 by 649, we get 0 and a remainder of 437.
The next digit of our result is 0. 
Result so far: 4380.0
The remainder is 437 after subtracting 0 from 437.
Bring next digit (1) of the dividend behind the 437 and repeat the process: 4371 / 649

On to step 8:
4371 divided by 649 is 6 with a remainder of 477.
Put 6 as the next digit of the answer. 
Result so far: 43806.0
Subtracting 3894 from 4371 leaves us with 477.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

Going ahead to step 9:
If we divide 4770 by 649, we get 7 and a remainder of 227.
Record the quotient 7 as the next digit in the result. 
Result so far: 43806.7
Subtracting 4543 from 4770 leaves us with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Step 10:
649 can be fit into 2270 3 times, resulting in a remainder of 323.
Write down 3 as next digit of the result. 
Result so far: 43806.73
If we take 1947 away from 2270, we end up with 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

Let's proceed to step 11:
649 can be fit into 3230 4 times, resulting in a remainder of 634.
Write down 4 as next digit of the result. 
Result so far: 43806.734
Subtracting 2596 from 3230 leaves us with 634.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6340, and continue the process.

On to step 12:
When dividing 6340 by 649, we get 9 with a remainder of 499.
Use 9 as the next digit of our solution. 
Result so far: 43806.7349
Subtract 5841 from 6340 to get 499.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4990, and continue the process.

On to step 13:
649 can be fit into 4990 7 times, resulting in a remainder of 447.
Use 7 as the next digit of our solution. 
Result so far: 43806.73497
If we take 4543 away from 4990, we end up with 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

Moving on to step 14:
4470 divided by 649 is 6 with a remainder of 576.
Record the quotient 6 as the next digit in the result. 
Result so far: 43806.734976
If we take 3894 away from 4470, we end up with 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Let's proceed to step 15:
If we divide 5760 by 649, we get 8 and a remainder of 568.
Write down 8 as next digit of the result. 
Result so far: 43806.7349768
Deduct 5192 from 5760 and we're left with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Going ahead to step 16:
5680 divided by 649 is 8 with a remainder of 488.
The number 8 becomes the next digit in our result. 
Result so far: 43806.73497688
If we take 5192 away from 5680, we end up with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

The final outcome is 43806.73497688, with a leftover of 4.88e-07.