We look at the division of 290896 by 78 
The aim is to understand the frequency of 78 in 290896.

Going ahead to step 1:
2 divided by 78 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 78

Moving on to step 2:
29 divided by 78 is 0 with a remainder of 29.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 29 after subtracting 0 from 29.
Bring next digit (0) of the dividend behind the 29 and repeat the process: 290 / 78

Let's proceed to step 3:
78 goes into 290 3 times with a remainder of 56.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 234 from 290, we get 56.
Append the next digit (8) from the dividend to 56 and continue with: 568 / 78

Advancing to step 4:
78 goes into 568 7 times with a remainder of 22.
Write down 7 as next digit of the result. 
Result so far: 37.0
Subtract 546 from 568 to get 22.
Take the next digit (9) from the dividend and append it to 22, then repeat: 229 / 78

On to step 5:
When dividing 229 by 78, we get 2 with a remainder of 73.
Put 2 as the next digit of the answer. 
Result so far: 372.0
Subtracting 156 from 229 leaves us with 73.
Take the next digit (6) from the dividend and append it to 73, then repeat: 736 / 78

On to step 6:
When dividing 736 by 78, we get 9 with a remainder of 34.
The next digit of our result is 9. 
Result so far: 3729.0
Subtract 702 from 736 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 7:
78 can be fit into 340 4 times, resulting in a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 3729.4
Subtracting 312 from 340 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 8:
78 can be fit into 280 3 times, resulting in a remainder of 46.
The number 3 becomes the next digit in our result. 
Result so far: 3729.43
The remainder is 46 after subtracting 234 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 9:
78 goes into 460 5 times with a remainder of 70.
The next digit of our result is 5. 
Result so far: 3729.435
Subtracting 390 from 460 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 10:
If we divide 700 by 78, we get 8 and a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 3729.4358
If we subtract 624 from 700, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 11:
78 goes into 760 9 times with a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 3729.43589
Deduct 702 from 760 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 12:
When dividing 580 by 78, we get 7 with a remainder of 34.
Use 7 as the next digit of our solution. 
Result so far: 3729.435897
Deduct 546 from 580 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 13:
The number 78 fits into 340 4 times, leaving a remainder of 28.
The next digit of our result is 4. 
Result so far: 3729.4358974
If we subtract 312 from 340, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 14:
280 divided by 78 is 3 with a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 3729.43589743
Subtract 234 from 280 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final result is 3729.43589743 with a remainder of 4.6e-08.