We divide 80776555 by 648
The aim is to understand the frequency of 648 in 80776555.

On to step 1:
648 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 648

On to step 2:
648 goes into 80 0 times with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Append the next digit (7) from the dividend to 80 and continue with: 807 / 648

On to step 3:
648 can be fit into 807 1 times, resulting in a remainder of 159.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 648 from 807 to get 159.
Take the next digit (7) from the dividend and append it to 159, then repeat: 1597 / 648

Advancing to step 4:
When dividing 1597 by 648, we get 2 with a remainder of 301.
The next digit of our result is 2. 
Result so far: 12.0
If we take 1296 away from 1597, we end up with 301.
Bring next digit (6) of the dividend behind the 301 and repeat the process: 3016 / 648

On to step 5:
When dividing 3016 by 648, we get 4 with a remainder of 424.
The next digit of our result is 4. 
Result so far: 124.0
The remainder is 424 after subtracting 2592 from 3016.
Include the next digit (5) from the dividend after 424, then repeat: 4245 / 648

On to step 6:
The number 648 fits into 4245 6 times, leaving a remainder of 357.
Record the quotient 6 as the next digit in the result. 
Result so far: 1246.0
Subtracting 3888 from 4245 leaves us with 357.
Bring next digit (5) of the dividend behind the 357 and repeat the process: 3575 / 648

Step 7:
648 can be fit into 3575 5 times, resulting in a remainder of 335.
The next digit of our result is 5. 
Result so far: 12465.0
Deduct 3240 from 3575 and we're left with 335.
Grab the next digit (5) from the dividend, add it to 335, then carry on: 3355 / 648

Advancing to step 8:
3355 divided by 648 is 5 with a remainder of 115.
Record the quotient 5 as the next digit in the result. 
Result so far: 124655.0
If we subtract 3240 from 3355, we get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

On to step 9:
648 goes into 1150 1 times with a remainder of 502.
Write down 1 as next digit of the result. 
Result so far: 124655.1
The remainder is 502 after subtracting 648 from 1150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

On to step 10:
If we divide 5020 by 648, we get 7 and a remainder of 484.
The number 7 becomes the next digit in our result. 
Result so far: 124655.17
Deduct 4536 from 5020 and we're left with 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Going ahead to step 11:
When dividing 4840 by 648, we get 7 with a remainder of 304.
Put 7 as the next digit of the answer. 
Result so far: 124655.177
Subtract 4536 from 4840 to get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Our division results in 124655.177 with a remaining 0.0304.