55368387 divided by 648 
The aim is to understand the frequency of 648 in 55368387.

Let's proceed to step 1:
The number 648 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 648

Step 2:
648 can be fit into 55 0 times, resulting in a remainder of 55.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 55 to get 55.
Bring next digit (3) of the dividend behind the 55 and repeat the process: 553 / 648

On to step 3:
If we divide 553 by 648, we get 0 and a remainder of 553.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 553 leaves us with 553.
Fetch the next digit (6) from the dividend, attach it to 553 and continue: 5536 / 648

Let's proceed to step 4:
5536 divided by 648 is 8 with a remainder of 352.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 5184 from 5536 and we're left with 352.
Grab the next digit (8) from the dividend, add it to 352, then carry on: 3528 / 648

Let's proceed to step 5:
648 goes into 3528 5 times with a remainder of 288.
The next digit of our result is 5. 
Result so far: 85.0
If we subtract 3240 from 3528, we get 288.
Include the next digit (3) from the dividend after 288, then repeat: 2883 / 648

Advancing to step 6:
648 goes into 2883 4 times with a remainder of 291.
Record the quotient 4 as the next digit in the result. 
Result so far: 854.0
If we take 2592 away from 2883, we end up with 291.
Include the next digit (8) from the dividend after 291, then repeat: 2918 / 648

Let's proceed to step 7:
2918 divided by 648 is 4 with a remainder of 326.
The next digit of our result is 4. 
Result so far: 8544.0
The remainder is 326 after subtracting 2592 from 2918.
Grab the next digit (7) from the dividend, add it to 326, then carry on: 3267 / 648

Let's proceed to step 8:
648 can be fit into 3267 5 times, resulting in a remainder of 27.
Record the quotient 5 as the next digit in the result. 
Result so far: 85445.0
Subtract 3240 from 3267 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 9:
If we divide 270 by 648, we get 0 and a remainder of 270.
Use 0 as the next digit of our solution. 
Result so far: 85445.0
Subtract 0 from 270 to get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Let's proceed to step 10:
The number 648 fits into 2700 4 times, leaving a remainder of 108.
Write down 4 as next digit of the result. 
Result so far: 85445.04
Deduct 2592 from 2700 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Let's proceed to step 11:
1080 divided by 648 is 1 with a remainder of 432.
Record the quotient 1 as the next digit in the result. 
Result so far: 85445.041
Deduct 648 from 1080 and we're left with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Going ahead to step 12:
If we divide 4320 by 648, we get 6 and a remainder of 432.
Put 6 as the next digit of the answer. 
Result so far: 85445.0416
Deduct 3888 from 4320 and we're left with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Advancing to step 13:
648 goes into 4320 6 times with a remainder of 432.
Put 6 as the next digit of the answer. 
Result so far: 85445.04166
If we subtract 3888 from 4320, we get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

After the division, we end up with 85445.04166 and a remainder of 0.000432.