515728 ÷ 77 
The aim is to understand the frequency of 77 in 515728.

Let's proceed to step 1:
The number 77 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 77

Advancing to step 2:
77 goes into 51 0 times with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Take the next digit (5) from the dividend and append it to 51, then repeat: 515 / 77

Advancing to step 3:
If we divide 515 by 77, we get 6 and a remainder of 53.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Deduct 462 from 515 and we're left with 53.
Include the next digit (7) from the dividend after 53, then repeat: 537 / 77

Let's proceed to step 4:
537 divided by 77 is 6 with a remainder of 75.
The next digit of our result is 6. 
Result so far: 66.0
The remainder is 75 after subtracting 462 from 537.
Append the next digit (2) from the dividend to 75 and continue with: 752 / 77

Let's proceed to step 5:
752 divided by 77 is 9 with a remainder of 59.
The number 9 becomes the next digit in our result. 
Result so far: 669.0
The remainder is 59 after subtracting 693 from 752.
Append the next digit (8) from the dividend to 59 and continue with: 598 / 77

Let's proceed to step 6:
77 goes into 598 7 times with a remainder of 59.
Write down 7 as next digit of the result. 
Result so far: 6697.0
If we subtract 539 from 598, we get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Step 7:
590 divided by 77 is 7 with a remainder of 51.
The number 7 becomes the next digit in our result. 
Result so far: 6697.7
If we subtract 539 from 590, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 8:
77 goes into 510 6 times with a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 6697.76
Subtract 462 from 510 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 9:
The number 77 fits into 480 6 times, leaving a remainder of 18.
The next digit of our result is 6. 
Result so far: 6697.766
Deduct 462 from 480 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 6697.766 with a remaining 0.0018.