Let's divide 577790 by 77
The aim is to understand the frequency of 77 in 577790.

Advancing to step 1:
77 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 77

Going ahead to step 2:
77 goes into 57 0 times with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 57 and we're left with 57.
Include the next digit (7) from the dividend after 57, then repeat: 577 / 77

Let's proceed to step 3:
577 divided by 77 is 7 with a remainder of 38.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 539 away from 577, we end up with 38.
Bring next digit (7) of the dividend behind the 38 and repeat the process: 387 / 77

On to step 4:
If we divide 387 by 77, we get 5 and a remainder of 2.
The next digit of our result is 5. 
Result so far: 75.0
If we subtract 385 from 387, we get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 77

Moving on to step 5:
The number 77 fits into 29 0 times, leaving a remainder of 29.
Use 0 as the next digit of our solution. 
Result so far: 750.0
Deduct 0 from 29 and we're left with 29.
Bring next digit (0) of the dividend behind the 29 and repeat the process: 290 / 77

On to step 6:
The number 77 fits into 290 3 times, leaving a remainder of 59.
The number 3 becomes the next digit in our result. 
Result so far: 7503.0
Subtracting 231 from 290 leaves us with 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:
77 can be fit into 590 7 times, resulting in a remainder of 51.
The next digit of our result is 7. 
Result so far: 7503.7
Subtracting 539 from 590 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 8:
The number 77 fits into 510 6 times, leaving a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 7503.76
Subtracting 462 from 510 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 9:
480 divided by 77 is 6 with a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 7503.766
If we take 462 away from 480, we end up 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.

In conclusion, the division gives 7503.766 with a balance of 0.0018.