We look at the division of 673814 by 77 
The aim is to understand the frequency of 77 in 673814.

Step 1:
The number 77 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 77

Going ahead to step 2:
The number 77 fits into 67 0 times, leaving a remainder of 67.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 67 leaves us with 67.
Grab the next digit (3) from the dividend, add it to 67, then carry on: 673 / 77

Moving on to step 3:
77 goes into 673 8 times with a remainder of 57.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 616 away from 673, we end up with 57.
Bring next digit (8) of the dividend behind the 57 and repeat the process: 578 / 77

Step 4:
77 goes into 578 7 times with a remainder of 39.
The next digit of our result is 7. 
Result so far: 87.0
If we subtract 539 from 578, we get 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 77

Moving on to step 5:
When dividing 391 by 77, we get 5 with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 875.0
Subtracting 385 from 391 leaves us with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 77

Going ahead to step 6:
77 can be fit into 64 0 times, resulting in a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 8750.0
Subtract 0 from 64 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 7:
When dividing 640 by 77, we get 8 with a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 8750.8
The remainder is 24 after subtracting 616 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 8:
77 goes into 240 3 times with a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 8750.83
Deduct 231 from 240 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
The number 77 fits into 90 1 times, leaving a remainder of 13.
The next digit of our result is 1. 
Result so far: 8750.831
The remainder is 13 after subtracting 77 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 10:
77 can be fit into 130 1 times, resulting in a remainder of 53.
Write down 1 as next digit of the result. 
Result so far: 8750.8311
If we take 77 away from 130, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

The quotient of the division is 8750.8311, and the remainder is 0.00053.