661296 ÷ 77 
The aim is to understand the frequency of 77 in 661296.

Let's proceed to step 1:
77 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 77

On to step 2:
77 goes into 66 0 times with a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Append the next digit (1) from the dividend to 66 and continue with: 661 / 77

Let's proceed to step 3:
When dividing 661 by 77, we get 8 with a remainder of 45.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 616 from 661 leaves us with 45.
Include the next digit (2) from the dividend after 45, then repeat: 452 / 77

Moving on to step 4:
77 can be fit into 452 5 times, resulting in a remainder of 67.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
If we subtract 385 from 452, we get 67.
Grab the next digit (9) from the dividend, add it to 67, then carry on: 679 / 77

Let's proceed to step 5:
The number 77 fits into 679 8 times, leaving a remainder of 63.
The next digit of our result is 8. 
Result so far: 858.0
Subtract 616 from 679 to get 63.
Grab the next digit (6) from the dividend, add it to 63, then carry on: 636 / 77

Going ahead to step 6:
77 can be fit into 636 8 times, resulting in a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 8588.0
If we subtract 616 from 636, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 7:
200 divided by 77 is 2 with a remainder of 46.
The number 2 becomes the next digit in our result. 
Result so far: 8588.2
Subtracting 154 from 200 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 8:
460 divided by 77 is 5 with a remainder of 75.
The next digit of our result is 5. 
Result so far: 8588.25
Subtract 385 from 460 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 9:
When dividing 750 by 77, we get 9 with a remainder of 57.
Record the quotient 9 as the next digit in the result. 
Result so far: 8588.259
If we subtract 693 from 750, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 10:
77 goes into 570 7 times with a remainder of 31.
Put 7 as the next digit of the answer. 
Result so far: 8588.2597
Subtracting 539 from 570 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 11:
310 divided by 77 is 4 with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 8588.25974
If we subtract 308 from 310, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 12:
77 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 8588.25974
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 13:
If we divide 200 by 77, we get 2 and a remainder of 46.
Use 2 as the next digit of our solution. 
Result so far: 8588.2597402
If we subtract 154 from 200, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 14:
When dividing 460 by 77, we get 5 with a remainder of 75.
The next digit of our result is 5. 
Result so far: 8588.25974025
Subtract 385 from 460 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

The final outcome is 8588.25974025, with a leftover of 7.5e-08.