We're dividing 309635 by 78 
The aim is to understand the frequency of 78 in 309635.

Moving on to step 1:
3 divided by 78 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 78

Advancing to step 2:
The number 78 fits into 30 0 times, leaving a remainder of 30.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 30 after subtracting 0 from 30.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 78

Step 3:
When dividing 309 by 78, we get 3 with a remainder of 75.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 234 from 309 leaves us with 75.
Include the next digit (6) from the dividend after 75, then repeat: 756 / 78

Step 4:
The number 78 fits into 756 9 times, leaving a remainder of 54.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Subtract 702 from 756 to get 54.
Include the next digit (3) from the dividend after 54, then repeat: 543 / 78

Step 5:
78 goes into 543 6 times with a remainder of 75.
The next digit of our result is 6. 
Result so far: 396.0
Deduct 468 from 543 and we're left with 75.
Bring next digit (5) of the dividend behind the 75 and repeat the process: 755 / 78

Step 6:
The number 78 fits into 755 9 times, leaving a remainder of 53.
Put 9 as the next digit of the answer. 
Result so far: 3969.0
The remainder is 53 after subtracting 702 from 755.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 7:
The number 78 fits into 530 6 times, leaving a remainder of 62.
The number 6 becomes the next digit in our result. 
Result so far: 3969.6
Subtract 468 from 530 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 8:
The number 78 fits into 620 7 times, leaving a remainder of 74.
The next digit of our result is 7. 
Result so far: 3969.67
Deduct 546 from 620 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 9:
740 divided by 78 is 9 with a remainder of 38.
Write down 9 as next digit of the result. 
Result so far: 3969.679
If we subtract 702 from 740, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
78 can be fit into 380 4 times, resulting in a remainder of 68.
The next digit of our result is 4. 
Result so far: 3969.6794
Deduct 312 from 380 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 11:
78 can be fit into 680 8 times, resulting in a remainder of 56.
Write down 8 as next digit of the result. 
Result so far: 3969.67948
The remainder is 56 after subtracting 624 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 12:
When dividing 560 by 78, we get 7 with a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 3969.679487
Deduct 546 from 560 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 13:
When dividing 140 by 78, we get 1 with a remainder of 62.
Use 1 as the next digit of our solution. 
Result so far: 3969.6794871
If we take 78 away from 140, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 14:
78 goes into 620 7 times with a remainder of 74.
Write down 7 as next digit of the result. 
Result so far: 3969.67948717
If we take 546 away from 620, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Our division results in 3969.67948717 with a remaining 7.4e-08.