We look at the division of 168532 by 78 
The aim is to understand the frequency of 78 in 168532.

On to step 1:
If we divide 1 by 78, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 78

Moving on to step 2:
16 divided by 78 is 0 with a remainder of 16.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Fetch the next digit (8) from the dividend, attach it to 16 and continue: 168 / 78

Let's proceed to step 3:
78 can be fit into 168 2 times, resulting in a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 12 after subtracting 156 from 168.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 78

Step 4:
The number 78 fits into 125 1 times, leaving a remainder of 47.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we subtract 78 from 125, we get 47.
Fetch the next digit (3) from the dividend, attach it to 47 and continue: 473 / 78

Moving on to step 5:
78 goes into 473 6 times with a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 216.0
Subtracting 468 from 473 leaves us with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 78

On to step 6:
When dividing 52 by 78, we get 0 with a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 2160.0
If we subtract 0 from 52, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 7:
78 goes into 520 6 times with a remainder of 52.
Write down 6 as next digit of the result. 
Result so far: 2160.6
If we subtract 468 from 520, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 8:
If we divide 520 by 78, we get 6 and a remainder of 52.
The next digit of our result is 6. 
Result so far: 2160.66
If we subtract 468 from 520, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

After the division, we end up with 2160.66 and a remainder of 0.052.