39708 ÷ 51 
The aim is to understand the frequency of 51 in 39708.

Step 1:
When dividing 3 by 51, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 51

Let's proceed to step 2:
When dividing 39 by 51, we get 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Take the next digit (7) from the dividend and append it to 39, then repeat: 397 / 51

Moving on to step 3:
If we divide 397 by 51, we get 7 and a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 357 from 397 to get 40.
Append the next digit (0) from the dividend to 40 and continue with: 400 / 51

On to step 4:
51 goes into 400 7 times with a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
Subtracting 357 from 400 leaves us with 43.
Append the next digit (8) from the dividend to 43 and continue with: 438 / 51

On to step 5:
When dividing 438 by 51, we get 8 with a remainder of 30.
Put 8 as the next digit of the answer. 
Result so far: 778.0
Subtracting 408 from 438 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 6:
The number 51 fits into 300 5 times, leaving a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 778.5
Deduct 255 from 300 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 7:
51 can be fit into 450 8 times, resulting in a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 778.58
The remainder is 42 after subtracting 408 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 8:
420 divided by 51 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 778.588
If we take 408 away from 420, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 778.588, with a leftover of 0.0012.