We divide 338039 by 78
The aim is to understand the frequency of 78 in 338039.

Advancing to step 1:
3 divided by 78 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 78

On to step 2:
If we divide 33 by 78, we get 0 and a remainder of 33.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 33 leaves us with 33.
Append the next digit (8) from the dividend to 33 and continue with: 338 / 78

Moving on to step 3:
The number 78 fits into 338 4 times, leaving a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 312 from 338 leaves us with 26.
Fetch the next digit (0) from the dividend, attach it to 26 and continue: 260 / 78

Step 4:
If we divide 260 by 78, we get 3 and a remainder of 26.
The next digit of our result is 3. 
Result so far: 43.0
Subtracting 234 from 260 leaves us with 26.
Bring next digit (3) of the dividend behind the 26 and repeat the process: 263 / 78

Moving on to step 5:
78 can be fit into 263 3 times, resulting in a remainder of 29.
The next digit of our result is 3. 
Result so far: 433.0
If we take 234 away from 263, we end up with 29.
Append the next digit (9) from the dividend to 29 and continue with: 299 / 78

Let's proceed to step 6:
78 can be fit into 299 3 times, resulting in a remainder of 65.
Write down 3 as next digit of the result. 
Result so far: 4333.0
Subtracting 234 from 299 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 7:
The number 78 fits into 650 8 times, leaving a remainder of 26.
Use 8 as the next digit of our solution. 
Result so far: 4333.8
If we subtract 624 from 650, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 8:
260 divided by 78 is 3 with a remainder of 26.
Use 3 as the next digit of our solution. 
Result so far: 4333.83
If we subtract 234 from 260, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 9:
If we divide 260 by 78, we get 3 and a remainder of 26.
Use 3 as the next digit of our solution. 
Result so far: 4333.833
The remainder is 26 after subtracting 234 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The final result is 4333.833 with a remainder of 0.0026.