We look at the division of 683642 by 77 
The aim is to understand the frequency of 77 in 683642.

Advancing to step 1:
When dividing 6 by 77, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 77

Let's proceed to step 2:
77 can be fit into 68 0 times, resulting in a remainder of 68.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 68, we get 68.
Append the next digit (3) from the dividend to 68 and continue with: 683 / 77

Step 3:
If we divide 683 by 77, we get 8 and a remainder of 67.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
The remainder is 67 after subtracting 616 from 683.
Append the next digit (6) from the dividend to 67 and continue with: 676 / 77

Step 4:
If we divide 676 by 77, we get 8 and a remainder of 60.
The number 8 becomes the next digit in our result. 
Result so far: 88.0
Subtracting 616 from 676 leaves us with 60.
Append the next digit (4) from the dividend to 60 and continue with: 604 / 77

Moving on to step 5:
If we divide 604 by 77, we get 7 and a remainder of 65.
Put 7 as the next digit of the answer. 
Result so far: 887.0
If we subtract 539 from 604, we get 65.
Grab the next digit (2) from the dividend, add it to 65, then carry on: 652 / 77

Going ahead to step 6:
77 can be fit into 652 8 times, resulting in a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 8878.0
If we subtract 616 from 652, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 7:
The number 77 fits into 360 4 times, leaving a remainder of 52.
Use 4 as the next digit of our solution. 
Result so far: 8878.4
Subtracting 308 from 360 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 8:
77 can be fit into 520 6 times, resulting in a remainder of 58.
The next digit of our result is 6. 
Result so far: 8878.46
If we subtract 462 from 520, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 9:
580 divided by 77 is 7 with a remainder of 41.
The next digit of our result is 7. 
Result so far: 8878.467
The remainder is 41 after subtracting 539 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 10:
410 divided by 77 is 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 8878.4675
Subtract 385 from 410 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 11:
250 divided by 77 is 3 with a remainder of 19.
Put 3 as the next digit of the answer. 
Result so far: 8878.46753
Subtracting 231 from 250 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 12:
77 can be fit into 190 2 times, resulting in a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 8878.467532
Subtract 154 from 190 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 13:
77 can be fit into 360 4 times, resulting in a remainder of 52.
The next digit of our result is 4. 
Result so far: 8878.4675324
The remainder is 52 after subtracting 308 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 14:
520 divided by 77 is 6 with a remainder of 58.
The number 6 becomes the next digit in our result. 
Result so far: 8878.46753246
Deduct 462 from 520 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

The final outcome is 8878.46753246, with a leftover of 5.8e-08.