We look at the division of 648325 by 77 
The aim is to understand the frequency of 77 in 648325.

Let's proceed to step 1:
The number 77 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 77

Advancing to step 2:
77 can be fit into 64 0 times, resulting in a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Fetch the next digit (8) from the dividend, attach it to 64 and continue: 648 / 77

Step 3:
If we divide 648 by 77, we get 8 and a remainder of 32.
The next digit of our result is 8. 
Result so far: 8.0
Deduct 616 from 648 and we're left with 32.
Grab the next digit (3) from the dividend, add it to 32, then carry on: 323 / 77

Going ahead to step 4:
If we divide 323 by 77, we get 4 and a remainder of 15.
The number 4 becomes the next digit in our result. 
Result so far: 84.0
If we take 308 away from 323, we end up with 15.
Grab the next digit (2) from the dividend, add it to 15, then carry on: 152 / 77

Moving on to step 5:
When dividing 152 by 77, we get 1 with a remainder of 75.
Record the quotient 1 as the next digit in the result. 
Result so far: 841.0
Subtract 77 from 152 to get 75.
Include the next digit (5) from the dividend after 75, then repeat: 755 / 77

Going ahead to step 6:
The number 77 fits into 755 9 times, leaving a remainder of 62.
The number 9 becomes the next digit in our result. 
Result so far: 8419.0
Deduct 693 from 755 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 7:
When dividing 620 by 77, we get 8 with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 8419.8
Subtract 616 from 620 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
The number 77 fits into 40 0 times, leaving a remainder of 40.
The next digit of our result is 0. 
Result so far: 8419.8
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
77 goes into 400 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 8419.805
Subtracting 385 from 400 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 10:
150 divided by 77 is 1 with a remainder of 73.
Use 1 as the next digit of our solution. 
Result so far: 8419.8051
If we subtract 77 from 150, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 11:
When dividing 730 by 77, we get 9 with a remainder of 37.
Write down 9 as next digit of the result. 
Result so far: 8419.80519
If we take 693 away from 730, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 12:
The number 77 fits into 370 4 times, leaving a remainder of 62.
Put 4 as the next digit of the answer. 
Result so far: 8419.805194
If we take 308 away from 370, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 13:
77 can be fit into 620 8 times, resulting in a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 8419.8051948
Subtracting 616 from 620 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 14:
77 goes into 40 0 times with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 8419.8051948
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Our division results in 8419.8051948 with a remaining 4e-08.