We look at the division of 909469 by 78 
The aim is to understand the frequency of 78 in 909469.

Advancing to step 1:
9 divided by 78 is 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 78

Moving on to step 2:
When dividing 90 by 78, we get 1 with a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 78 away from 90, we end up with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 78

Advancing to step 3:
129 divided by 78 is 1 with a remainder of 51.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Deduct 78 from 129 and we're left with 51.
Bring next digit (4) of the dividend behind the 51 and repeat the process: 514 / 78

On to step 4:
The number 78 fits into 514 6 times, leaving a remainder of 46.
The next digit of our result is 6. 
Result so far: 116.0
If we take 468 away from 514, we end up with 46.
Fetch the next digit (6) from the dividend, attach it to 46 and continue: 466 / 78

On to step 5:
78 goes into 466 5 times with a remainder of 76.
Write down 5 as next digit of the result. 
Result so far: 1165.0
Subtracting 390 from 466 leaves us with 76.
Take the next digit (9) from the dividend and append it to 76, then repeat: 769 / 78

Step 6:
When dividing 769 by 78, we get 9 with a remainder of 67.
Put 9 as the next digit of the answer. 
Result so far: 11659.0
Subtracting 702 from 769 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 7:
78 can be fit into 670 8 times, resulting in a remainder of 46.
Write down 8 as next digit of the result. 
Result so far: 11659.8
The remainder is 46 after subtracting 624 from 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 8:
If we divide 460 by 78, we get 5 and a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 11659.85
The remainder is 70 after subtracting 390 from 460.
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 9:
If we divide 700 by 78, we get 8 and a remainder of 76.
The next digit of our result is 8. 
Result so far: 11659.858
Deduct 624 from 700 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 10:
78 can be fit into 760 9 times, resulting in a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 11659.8589
The remainder is 58 after subtracting 702 from 760.
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 11:
78 goes into 580 7 times with a remainder of 34.
Put 7 as the next digit of the answer. 
Result so far: 11659.85897
The remainder is 34 after subtracting 546 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 12:
340 divided by 78 is 4 with a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 11659.858974
Deduct 312 from 340 and we're left 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.

Moving on to step 13:
78 can be fit into 280 3 times, resulting in a remainder of 46.
Record the quotient 3 as the next digit in the result. 
Result so far: 11659.8589743
If we take 234 away from 280, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 14:
When dividing 460 by 78, we get 5 with a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 11659.85897435
If we take 390 away from 460, we end up 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.

The final result is 11659.85897435 with a remainder of 7e-08.