86786 divided by 75 
The aim is to understand the frequency of 75 in 86786.

Step 1:
When dividing 8 by 75, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 75

Step 2:
75 goes into 86 1 times with a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 75 from 86, we get 11.
Fetch the next digit (7) from the dividend, attach it to 11 and continue: 117 / 75

Step 3:
The number 75 fits into 117 1 times, leaving a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Deduct 75 from 117 and we're left with 42.
Take the next digit (8) from the dividend and append it to 42, then repeat: 428 / 75

Moving on to step 4:
428 divided by 75 is 5 with a remainder of 53.
The next digit of our result is 5. 
Result so far: 115.0
The remainder is 53 after subtracting 375 from 428.
Grab the next digit (6) from the dividend, add it to 53, then carry on: 536 / 75

Advancing to step 5:
When dividing 536 by 75, we get 7 with a remainder of 11.
The next digit of our result is 7. 
Result so far: 1157.0
The remainder is 11 after subtracting 525 from 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 6:
75 goes into 110 1 times with a remainder of 35.
The next digit of our result is 1. 
Result so far: 1157.1
Subtract 75 from 110 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 7:
75 can be fit into 350 4 times, resulting in a remainder of 50.
The next digit of our result is 4. 
Result so far: 1157.14
Deduct 300 from 350 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
If we divide 500 by 75, we get 6 and a remainder of 50.
Record the quotient 6 as the next digit in the result. 
Result so far: 1157.146
The remainder is 50 after subtracting 450 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 9:
If we divide 500 by 75, we get 6 and a remainder of 50.
The number 6 becomes the next digit in our result. 
Result so far: 1157.1466
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The quotient of the division is 1157.1466, and the remainder is 0.0005.