We're dividing 40954502 by 648 
The aim is to understand the frequency of 648 in 40954502.

On to step 1:
648 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 648

Going ahead to step 2:
648 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Fetch the next digit (9) from the dividend, attach it to 40 and continue: 409 / 648

Advancing to step 3:
The number 648 fits into 409 0 times, leaving a remainder of 409.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 409, we get 409.
Grab the next digit (5) from the dividend, add it to 409, then carry on: 4095 / 648

Advancing to step 4:
4095 divided by 648 is 6 with a remainder of 207.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 3888 from 4095 and we're left with 207.
Fetch the next digit (4) from the dividend, attach it to 207 and continue: 2074 / 648

Let's proceed to step 5:
648 goes into 2074 3 times with a remainder of 130.
Record the quotient 3 as the next digit in the result. 
Result so far: 63.0
Subtract 1944 from 2074 to get 130.
Take the next digit (5) from the dividend and append it to 130, then repeat: 1305 / 648

Step 6:
When dividing 1305 by 648, we get 2 with a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 632.0
The remainder is 9 after subtracting 1296 from 1305.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 648

Let's proceed to step 7:
90 divided by 648 is 0 with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 6320.0
The remainder is 90 after subtracting 0 from 90.
Include the next digit (2) from the dividend after 90, then repeat: 902 / 648

Moving on to step 8:
648 goes into 902 1 times with a remainder of 254.
Use 1 as the next digit of our solution. 
Result so far: 63201.0
If we subtract 648 from 902, we get 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Step 9:
If we divide 2540 by 648, we get 3 and a remainder of 596.
Record the quotient 3 as the next digit in the result. 
Result so far: 63201.3
Subtracting 1944 from 2540 leaves us 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.

On to step 10:
648 goes into 5960 9 times with a remainder of 128.
The number 9 becomes the next digit in our result. 
Result so far: 63201.39
Subtracting 5832 from 5960 leaves us with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

On to step 11:
1280 divided by 648 is 1 with a remainder of 632.
Record the quotient 1 as the next digit in the result. 
Result so far: 63201.391
Subtracting 648 from 1280 leaves us 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.

Moving on to step 12:
The number 648 fits into 6320 9 times, leaving a remainder of 488.
The number 9 becomes the next digit in our result. 
Result so far: 63201.3919
Subtract 5832 from 6320 to get 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

On to step 13:
648 goes into 4880 7 times with a remainder of 344.
Put 7 as the next digit of the answer. 
Result so far: 63201.39197
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.

On to step 14:
When dividing 3440 by 648, we get 5 with a remainder of 200.
Record the quotient 5 as the next digit in the result. 
Result so far: 63201.391975
If we take 3240 away from 3440, we end up 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.

On to step 15:
2000 divided by 648 is 3 with a remainder of 56.
Write down 3 as next digit of the result. 
Result so far: 63201.3919753
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:
648 goes into 560 0 times with a remainder of 560.
Use 0 as the next digit of our solution. 
Result so far: 63201.3919753
Deduct 0 from 560 and we're left 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.

After the division, we end up with 63201.3919753 and a remainder of 5.6e-07.