We're dividing 68552215 by 648 
The aim is to understand the frequency of 648 in 68552215.

Step 1:
6 divided by 648 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 648

Going ahead to step 2:
68 divided by 648 is 0 with a remainder of 68.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 68, we end up with 68.
Take the next digit (5) from the dividend and append it to 68, then repeat: 685 / 648

On to step 3:
685 divided by 648 is 1 with a remainder of 37.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 648 from 685, we get 37.
Take the next digit (5) from the dividend and append it to 37, then repeat: 375 / 648

Moving on to step 4:
The number 648 fits into 375 0 times, leaving a remainder of 375.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 375 after subtracting 0 from 375.
Bring next digit (2) of the dividend behind the 375 and repeat the process: 3752 / 648

Advancing to step 5:
648 goes into 3752 5 times with a remainder of 512.
The number 5 becomes the next digit in our result. 
Result so far: 105.0
Subtracting 3240 from 3752 leaves us with 512.
Bring next digit (2) of the dividend behind the 512 and repeat the process: 5122 / 648

Step 6:
648 goes into 5122 7 times with a remainder of 586.
Record the quotient 7 as the next digit in the result. 
Result so far: 1057.0
If we subtract 4536 from 5122, we get 586.
Include the next digit (1) from the dividend after 586, then repeat: 5861 / 648

Advancing to step 7:
The number 648 fits into 5861 9 times, leaving a remainder of 29.
Write down 9 as next digit of the result. 
Result so far: 10579.0
Subtracting 5832 from 5861 leaves us with 29.
Append the next digit (5) from the dividend to 29 and continue with: 295 / 648

Step 8:
When dividing 295 by 648, we get 0 with a remainder of 295.
Put 0 as the next digit of the answer. 
Result so far: 105790.0
Subtract 0 from 295 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 9:
648 can be fit into 2950 4 times, resulting in a remainder of 358.
Record the quotient 4 as the next digit in the result. 
Result so far: 105790.4
Subtracting 2592 from 2950 leaves us with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Going ahead to step 10:
When dividing 3580 by 648, we get 5 with a remainder of 340.
The next digit of our result is 5. 
Result so far: 105790.45
Subtracting 3240 from 3580 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 11:
The number 648 fits into 3400 5 times, leaving a remainder of 160.
Use 5 as the next digit of our solution. 
Result so far: 105790.455
Subtract 3240 from 3400 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Our division results in 105790.455 with a remaining 0.016.