39366 ÷ 77 
The aim is to understand the frequency of 77 in 39366.

Going ahead to step 1:
When dividing 3 by 77, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 77

Advancing to step 2:
39 divided by 77 is 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Grab the next digit (3) from the dividend, add it to 39, then carry on: 393 / 77

Going ahead to step 3:
The number 77 fits into 393 5 times, leaving a remainder of 8.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 385 from 393 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 77

On to step 4:
The number 77 fits into 86 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
Deduct 77 from 86 and we're left with 9.
Grab the next digit (6) from the dividend, add it to 9, then carry on: 96 / 77

Going ahead to step 5:
96 divided by 77 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 511.0
The remainder is 19 after subtracting 77 from 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 6:
If we divide 190 by 77, we get 2 and a remainder of 36.
Put 2 as the next digit of the answer. 
Result so far: 511.2
Deduct 154 from 190 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 7:
If we divide 360 by 77, we get 4 and a remainder of 52.
The number 4 becomes the next digit in our result. 
Result so far: 511.24
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.

On to step 8:
When dividing 520 by 77, we get 6 with a remainder of 58.
Record the quotient 6 as the next digit in the result. 
Result so far: 511.246
The remainder is 58 after subtracting 462 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 9:
The number 77 fits into 580 7 times, leaving a remainder of 41.
Put 7 as the next digit of the answer. 
Result so far: 511.2467
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.

On to step 10:
The number 77 fits into 410 5 times, leaving a remainder of 25.
The next digit of our result is 5. 
Result so far: 511.24675
The remainder is 25 after subtracting 385 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 11:
250 divided by 77 is 3 with a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 511.246753
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.

On to step 12:
77 can be fit into 190 2 times, resulting in a remainder of 36.
The next digit of our result is 2. 
Result so far: 511.2467532
Deduct 154 from 190 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 13:
77 can be fit into 360 4 times, resulting in a remainder of 52.
Write down 4 as next digit of the result. 
Result so far: 511.24675324
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.

The final result is 511.24675324 with a remainder of 5.2e-08.