We're dividing 787888 by 86 
The aim is to understand the frequency of 86 in 787888.

Step 1:
The number 86 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 86

Step 2:
When dividing 78 by 86, we get 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Take the next digit (7) from the dividend and append it to 78, then repeat: 787 / 86

Let's proceed to step 3:
86 can be fit into 787 9 times, resulting in a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we take 774 away from 787, we end up with 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 86

Let's proceed to step 4:
86 can be fit into 138 1 times, resulting in a remainder of 52.
Put 1 as the next digit of the answer. 
Result so far: 91.0
If we take 86 away from 138, we end up with 52.
Fetch the next digit (8) from the dividend, attach it to 52 and continue: 528 / 86

Going ahead to step 5:
The number 86 fits into 528 6 times, leaving a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 916.0
Subtracting 516 from 528 leaves us with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 86

Advancing to step 6:
The number 86 fits into 128 1 times, leaving a remainder of 42.
Record the quotient 1 as the next digit in the result. 
Result so far: 9161.0
Subtracting 86 from 128 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 7:
The number 86 fits into 420 4 times, leaving a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 9161.4
Deduct 344 from 420 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.

Moving on to step 8:
760 divided by 86 is 8 with a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 9161.48
Deduct 688 from 760 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 9:
When dividing 720 by 86, we get 8 with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 9161.488
If we subtract 688 from 720, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final result is 9161.488 with a remainder of 0.0032.