We're dividing 78642789 by 108 
The aim is to understand the frequency of 108 in 78642789.

Going ahead to step 1:
When dividing 7 by 108, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 108

Step 2:
78 divided by 108 is 0 with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Bring next digit (6) of the dividend behind the 78 and repeat the process: 786 / 108

Moving on to step 3:
The number 108 fits into 786 7 times, leaving a remainder of 30.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 756 from 786, we get 30.
Fetch the next digit (4) from the dividend, attach it to 30 and continue: 304 / 108

Step 4:
108 can be fit into 304 2 times, resulting in a remainder of 88.
Use 2 as the next digit of our solution. 
Result so far: 72.0
Subtract 216 from 304 to get 88.
Append the next digit (2) from the dividend to 88 and continue with: 882 / 108

Let's proceed to step 5:
882 divided by 108 is 8 with a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 728.0
Subtracting 864 from 882 leaves us with 18.
Fetch the next digit (7) from the dividend, attach it to 18 and continue: 187 / 108

Going ahead to step 6:
108 can be fit into 187 1 times, resulting in a remainder of 79.
Write down 1 as next digit of the result. 
Result so far: 7281.0
If we take 108 away from 187, we end up with 79.
Bring next digit (8) of the dividend behind the 79 and repeat the process: 798 / 108

Advancing to step 7:
The number 108 fits into 798 7 times, leaving a remainder of 42.
The next digit of our result is 7. 
Result so far: 72817.0
Subtract 756 from 798 to get 42.
Fetch the next digit (9) from the dividend, attach it to 42 and continue: 429 / 108

Let's proceed to step 8:
108 can be fit into 429 3 times, resulting in a remainder of 105.
The next digit of our result is 3. 
Result so far: 728173.0
If we take 324 away from 429, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Moving on to step 9:
108 goes into 1050 9 times with a remainder of 78.
The next digit of our result is 9. 
Result so far: 728173.9
The remainder is 78 after subtracting 972 from 1050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 10:
The number 108 fits into 780 7 times, leaving a remainder of 24.
Use 7 as the next digit of our solution. 
Result so far: 728173.97
Deduct 756 from 780 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 11:
108 goes into 240 2 times with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 728173.972
Deduct 216 from 240 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 12:
If we divide 240 by 108, we get 2 and a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 728173.9722
If we subtract 216 from 240, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final outcome is 728173.9722, with a leftover of 0.00024.