We look at the division of 26330200 by 648 
The aim is to understand the frequency of 648 in 26330200.

Going ahead to step 1:
The number 648 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 648

Going ahead to step 2:
When dividing 26 by 648, we get 0 with a remainder of 26.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 26 after subtracting 0 from 26.
Append the next digit (3) from the dividend to 26 and continue with: 263 / 648

Step 3:
648 can be fit into 263 0 times, resulting in a remainder of 263.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 263 leaves us with 263.
Grab the next digit (3) from the dividend, add it to 263, then carry on: 2633 / 648

On to step 4:
2633 divided by 648 is 4 with a remainder of 41.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 2592 from 2633, we get 41.
Append the next digit (0) from the dividend to 41 and continue with: 410 / 648

Advancing to step 5:
648 can be fit into 410 0 times, resulting in a remainder of 410.
The next digit of our result is 0. 
Result so far: 40.0
Subtract 0 from 410 to get 410.
Include the next digit (2) from the dividend after 410, then repeat: 4102 / 648

On to step 6:
If we divide 4102 by 648, we get 6 and a remainder of 214.
The number 6 becomes the next digit in our result. 
Result so far: 406.0
If we take 3888 away from 4102, we end up with 214.
Grab the next digit (0) from the dividend, add it to 214, then carry on: 2140 / 648

Step 7:
648 can be fit into 2140 3 times, resulting in a remainder of 196.
Put 3 as the next digit of the answer. 
Result so far: 4063.0
Subtracting 1944 from 2140 leaves us with 196.
Append the next digit (0) from the dividend to 196 and continue with: 1960 / 648

Moving on to step 8:
648 goes into 1960 3 times with a remainder of 16.
Put 3 as the next digit of the answer. 
Result so far: 40633.0
If we take 1944 away from 1960, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
The number 648 fits into 160 0 times, leaving a remainder of 160.
The number 0 becomes the next digit in our result. 
Result so far: 40633.0
Subtracting 0 from 160 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 10:
648 can be fit into 1600 2 times, resulting in a remainder of 304.
The number 2 becomes the next digit in our result. 
Result so far: 40633.02
The remainder is 304 after subtracting 1296 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

On to step 11:
The number 648 fits into 3040 4 times, leaving a remainder of 448.
Use 4 as the next digit of our solution. 
Result so far: 40633.024
Deduct 2592 from 3040 and we're left with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Let's proceed to step 12:
The number 648 fits into 4480 6 times, leaving a remainder of 592.
The next digit of our result is 6. 
Result so far: 40633.0246
The remainder is 592 after subtracting 3888 from 4480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Let's proceed to step 13:
648 can be fit into 5920 9 times, resulting in a remainder of 88.
Write down 9 as next digit of the result. 
Result so far: 40633.02469
The remainder is 88 after subtracting 5832 from 5920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 14:
648 can be fit into 880 1 times, resulting in a remainder of 232.
Write down 1 as next digit of the result. 
Result so far: 40633.024691
Subtracting 648 from 880 leaves us with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Step 15:
2320 divided by 648 is 3 with a remainder of 376.
The next digit of our result is 3. 
Result so far: 40633.0246913
The remainder is 376 after subtracting 1944 from 2320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Advancing to step 16:
648 can be fit into 3760 5 times, resulting in a remainder of 520.
Record the quotient 5 as the next digit in the result. 
Result so far: 40633.02469135
Subtract 3240 from 3760 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

The final result is 40633.02469135 with a remainder of 5.2e-07.