393120 ÷ 78 
The aim is to understand the frequency of 78 in 393120.

Step 1:
78 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 78

Let's proceed to step 2:
The number 78 fits into 39 0 times, leaving a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Fetch the next digit (3) from the dividend, attach it to 39 and continue: 393 / 78

Moving on to step 3:
When dividing 393 by 78, we get 5 with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 390 from 393, we get 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 78

Let's proceed to step 4:
When dividing 31 by 78, we get 0 with a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 50.0
If we subtract 0 from 31, we get 31.
Fetch the next digit (2) from the dividend, attach it to 31 and continue: 312 / 78

Going ahead to step 5:
78 goes into 312 4 times with a remainder of 0.
The next digit of our result is 4. 
Result so far: 504.0
If we take 312 away from 312, we end up with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 78

On to step 6:
0 divided by 78 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5040.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
78 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 5040.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
78 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5040.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 5040.0, with a leftover of 0.0.