We divide 209678 by 78
The aim is to understand the frequency of 78 in 209678.

Advancing to step 1:
The number 78 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 78

Let's proceed to step 2:
When dividing 20 by 78, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Include the next digit (9) from the dividend after 20, then repeat: 209 / 78

Advancing to step 3:
If we divide 209 by 78, we get 2 and a remainder of 53.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 53 after subtracting 156 from 209.
Bring next digit (6) of the dividend behind the 53 and repeat the process: 536 / 78

Let's proceed to step 4:
When dividing 536 by 78, we get 6 with a remainder of 68.
Put 6 as the next digit of the answer. 
Result so far: 26.0
The remainder is 68 after subtracting 468 from 536.
Grab the next digit (7) from the dividend, add it to 68, then carry on: 687 / 78

Advancing to step 5:
When dividing 687 by 78, we get 8 with a remainder of 63.
Put 8 as the next digit of the answer. 
Result so far: 268.0
If we take 624 away from 687, we end up with 63.
Fetch the next digit (8) from the dividend, attach it to 63 and continue: 638 / 78

On to step 6:
78 goes into 638 8 times with a remainder of 14.
The next digit of our result is 8. 
Result so far: 2688.0
If we subtract 624 from 638, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 7:
78 goes into 140 1 times with a remainder of 62.
Record the quotient 1 as the next digit in the result. 
Result so far: 2688.1
Subtracting 78 from 140 leaves us 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.

Moving on 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: 2688.17
The remainder is 74 after subtracting 546 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 9:
78 goes into 740 9 times with a remainder of 38.
The number 9 becomes the next digit in our result. 
Result so far: 2688.179
Subtract 702 from 740 to 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.

Step 10:
78 goes into 380 4 times with a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 2688.1794
Subtract 312 from 380 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 11:
If we divide 680 by 78, we get 8 and a remainder of 56.
Write down 8 as next digit of the result. 
Result so far: 2688.17948
If we subtract 624 from 680, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 12:
If we divide 560 by 78, we get 7 and a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 2688.179487
Subtracting 546 from 560 leaves us 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.

Step 13:
78 can be fit into 140 1 times, resulting in a remainder of 62.
Put 1 as the next digit of the answer. 
Result so far: 2688.1794871
If we subtract 78 from 140, we 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.

Moving on to step 14:
78 goes into 620 7 times with a remainder of 74.
Use 7 as the next digit of our solution. 
Result so far: 2688.17948717
Subtracting 546 from 620 leaves us 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.

After the division, we end up with 2688.17948717 and a remainder of 7.4e-08.