We look at the division of 327591 by 78 
The aim is to understand the frequency of 78 in 327591.

Moving on to step 1:
If we divide 3 by 78, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 78

Let's proceed to step 2:
78 can be fit into 32 0 times, resulting in a remainder of 32.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 32, we get 32.
Take the next digit (7) from the dividend and append it to 32, then repeat: 327 / 78

Moving on to step 3:
78 can be fit into 327 4 times, resulting in a remainder of 15.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 312 from 327 leaves us with 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 78

Let's proceed to step 4:
When dividing 155 by 78, we get 1 with a remainder of 77.
Use 1 as the next digit of our solution. 
Result so far: 41.0
If we take 78 away from 155, we end up with 77.
Take the next digit (9) from the dividend and append it to 77, then repeat: 779 / 78

Let's proceed to step 5:
779 divided by 78 is 9 with a remainder of 77.
Record the quotient 9 as the next digit in the result. 
Result so far: 419.0
Subtracting 702 from 779 leaves us with 77.
Take the next digit (1) from the dividend and append it to 77, then repeat: 771 / 78

Going ahead to step 6:
78 goes into 771 9 times with a remainder of 69.
The next digit of our result is 9. 
Result so far: 4199.0
Subtracting 702 from 771 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 7:
78 can be fit into 690 8 times, resulting in a remainder of 66.
The number 8 becomes the next digit in our result. 
Result so far: 4199.8
Deduct 624 from 690 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.

On to step 8:
When dividing 660 by 78, we get 8 with a remainder of 36.
Write down 8 as next digit of the result. 
Result so far: 4199.88
Deduct 624 from 660 and we're left 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.

After the division, we end up with 4199.88 and a remainder of 0.036.