738969 divided by 78 
The aim is to understand the frequency of 78 in 738969.

Advancing to step 1:
7 divided by 78 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 78

On to step 2:
If we divide 73 by 78, we get 0 and a remainder of 73.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 73 after subtracting 0 from 73.
Grab the next digit (8) from the dividend, add it to 73, then carry on: 738 / 78

Advancing to step 3:
78 can be fit into 738 9 times, resulting in a remainder of 36.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 36 after subtracting 702 from 738.
Include the next digit (9) from the dividend after 36, then repeat: 369 / 78

Step 4:
78 can be fit into 369 4 times, resulting in a remainder of 57.
Use 4 as the next digit of our solution. 
Result so far: 94.0
Subtract 312 from 369 to get 57.
Bring next digit (6) of the dividend behind the 57 and repeat the process: 576 / 78

Let's proceed to step 5:
When dividing 576 by 78, we get 7 with a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 947.0
Subtract 546 from 576 to get 30.
Fetch the next digit (9) from the dividend, attach it to 30 and continue: 309 / 78

Moving on to step 6:
If we divide 309 by 78, we get 3 and a remainder of 75.
Use 3 as the next digit of our solution. 
Result so far: 9473.0
The remainder is 75 after subtracting 234 from 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 7:
If we divide 750 by 78, we get 9 and a remainder of 48.
The next digit of our result is 9. 
Result so far: 9473.9
Deduct 702 from 750 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 8:
The number 78 fits into 480 6 times, leaving a remainder of 12.
The next digit of our result is 6. 
Result so far: 9473.96
Deduct 468 from 480 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
When dividing 120 by 78, we get 1 with a remainder of 42.
The next digit of our result is 1. 
Result so far: 9473.961
If we subtract 78 from 120, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 10:
78 can be fit into 420 5 times, resulting in a remainder of 30.
The next digit of our result is 5. 
Result so far: 9473.9615
Deduct 390 from 420 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
78 goes into 300 3 times with a remainder of 66.
The number 3 becomes the next digit in our result. 
Result so far: 9473.96153
Deduct 234 from 300 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 12:
78 can be fit into 660 8 times, resulting in a remainder of 36.
The next digit of our result is 8. 
Result so far: 9473.961538
If we take 624 away from 660, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 13:
78 goes into 360 4 times with a remainder of 48.
Use 4 as the next digit of our solution. 
Result so far: 9473.9615384
Subtract 312 from 360 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 14:
78 can be fit into 480 6 times, resulting in a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 9473.96153846
The remainder is 12 after subtracting 468 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 9473.96153846, with a leftover of 1.2e-08.