We look at the division of 28605566 by 648 
The aim is to understand the frequency of 648 in 28605566.

Let's proceed to step 1:
2 divided by 648 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 648

Moving on to step 2:
If we divide 28 by 648, we get 0 and a remainder of 28.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Include the next digit (6) from the dividend after 28, then repeat: 286 / 648

Advancing to step 3:
648 goes into 286 0 times with a remainder of 286.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 286 leaves us with 286.
Grab the next digit (0) from the dividend, add it to 286, then carry on: 2860 / 648

Going ahead to step 4:
2860 divided by 648 is 4 with a remainder of 268.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 268 after subtracting 2592 from 2860.
Take the next digit (5) from the dividend and append it to 268, then repeat: 2685 / 648

Going ahead to step 5:
When dividing 2685 by 648, we get 4 with a remainder of 93.
The number 4 becomes the next digit in our result. 
Result so far: 44.0
If we subtract 2592 from 2685, we get 93.
Append the next digit (5) from the dividend to 93 and continue with: 935 / 648

Moving on to step 6:
648 goes into 935 1 times with a remainder of 287.
The next digit of our result is 1. 
Result so far: 441.0
If we subtract 648 from 935, we get 287.
Take the next digit (6) from the dividend and append it to 287, then repeat: 2876 / 648

Going ahead to step 7:
2876 divided by 648 is 4 with a remainder of 284.
Use 4 as the next digit of our solution. 
Result so far: 4414.0
Subtract 2592 from 2876 to get 284.
Bring next digit (6) of the dividend behind the 284 and repeat the process: 2846 / 648

Going ahead to step 8:
When dividing 2846 by 648, we get 4 with a remainder of 254.
The number 4 becomes the next digit in our result. 
Result so far: 44144.0
The remainder is 254 after subtracting 2592 from 2846.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Going ahead to step 9:
648 can be fit into 2540 3 times, resulting in a remainder of 596.
Record the quotient 3 as the next digit in the result. 
Result so far: 44144.3
If we take 1944 away from 2540, we end up with 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Step 10:
If we divide 5960 by 648, we get 9 and a remainder of 128.
Use 9 as the next digit of our solution. 
Result so far: 44144.39
Subtract 5832 from 5960 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 11:
If we divide 1280 by 648, we get 1 and a remainder of 632.
Record the quotient 1 as the next digit in the result. 
Result so far: 44144.391
If we take 648 away from 1280, we end up with 632.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6320, and continue the process.

Let's proceed to step 12:
6320 divided by 648 is 9 with a remainder of 488.
Use 9 as the next digit of our solution. 
Result so far: 44144.3919
If we take 5832 away from 6320, 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.

Step 13:
648 can be fit into 4880 7 times, resulting in a remainder of 344.
Record the quotient 7 as the next digit in the result. 
Result so far: 44144.39197
If we subtract 4536 from 4880, we get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Moving on to step 14:
648 can be fit into 3440 5 times, resulting in a remainder of 200.
Write down 5 as next digit of the result. 
Result so far: 44144.391975
Subtracting 3240 from 3440 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 15:
If we divide 2000 by 648, we get 3 and a remainder of 56.
Record the quotient 3 as the next digit in the result. 
Result so far: 44144.3919753
The remainder is 56 after subtracting 1944 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 16:
When dividing 560 by 648, we get 0 with a remainder of 560.
The number 0 becomes the next digit in our result. 
Result so far: 44144.3919753
Subtracting 0 from 560 leaves us with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

In conclusion, the division gives 44144.3919753 with a balance of 5.6e-07.