743929 ÷ 78 
The aim is to understand the frequency of 78 in 743929.

Step 1:
78 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 78

Advancing to step 2:
When dividing 74 by 78, we get 0 with a remainder of 74.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 74 after subtracting 0 from 74.
Grab the next digit (3) from the dividend, add it to 74, then carry on: 743 / 78

Let's proceed to step 3:
The number 78 fits into 743 9 times, leaving a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtract 702 from 743 to get 41.
Grab the next digit (9) from the dividend, add it to 41, then carry on: 419 / 78

Advancing to step 4:
419 divided by 78 is 5 with a remainder of 29.
Put 5 as the next digit of the answer. 
Result so far: 95.0
Subtract 390 from 419 to get 29.
Grab the next digit (2) from the dividend, add it to 29, then carry on: 292 / 78

Going ahead to step 5:
292 divided by 78 is 3 with a remainder of 58.
The next digit of our result is 3. 
Result so far: 953.0
Subtracting 234 from 292 leaves us with 58.
Append the next digit (9) from the dividend to 58 and continue with: 589 / 78

Let's proceed to step 6:
The number 78 fits into 589 7 times, leaving a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 9537.0
The remainder is 43 after subtracting 546 from 589.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 7:
The number 78 fits into 430 5 times, leaving a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 9537.5
If we subtract 390 from 430, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 8:
78 can be fit into 400 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 9537.55
Deduct 390 from 400 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 9537.55, with a leftover of 0.01.