780507 divided by 86 
The aim is to understand the frequency of 86 in 780507.

Advancing to step 1:
If we divide 7 by 86, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 86

Going ahead to step 2:
78 divided by 86 is 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Grab the next digit (0) from the dividend, add it to 78, then carry on: 780 / 86

Moving on to step 3:
86 can be fit into 780 9 times, resulting in a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 774 from 780 and we're left with 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 86

Step 4:
If we divide 65 by 86, we get 0 and a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 90.0
Deduct 0 from 65 and we're left with 65.
Take the next digit (0) from the dividend and append it to 65, then repeat: 650 / 86

Step 5:
The number 86 fits into 650 7 times, leaving a remainder of 48.
Record the quotient 7 as the next digit in the result. 
Result so far: 907.0
The remainder is 48 after subtracting 602 from 650.
Take the next digit (7) from the dividend and append it to 48, then repeat: 487 / 86

Let's proceed to step 6:
The number 86 fits into 487 5 times, leaving a remainder of 57.
Put 5 as the next digit of the answer. 
Result so far: 9075.0
Subtracting 430 from 487 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 7:
If we divide 570 by 86, we get 6 and a remainder of 54.
Write down 6 as next digit of the result. 
Result so far: 9075.6
The remainder is 54 after subtracting 516 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 8:
When dividing 540 by 86, we get 6 with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 9075.66
Subtracting 516 from 540 leaves us 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.

In conclusion, the division gives 9075.66 with a balance of 0.024.