We're dividing 869781 by 86 
The aim is to understand the frequency of 86 in 869781.

Advancing to step 1:
When dividing 8 by 86, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 86

Moving on to step 2:
86 goes into 86 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 86 away from 86, we end up with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 86

Step 3:
9 divided by 86 is 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 10.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 86

Step 4:
86 can be fit into 97 1 times, resulting in a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 101.0
If we subtract 86 from 97, we get 11.
Fetch the next digit (8) from the dividend, attach it to 11 and continue: 118 / 86

Going ahead to step 5:
86 goes into 118 1 times with a remainder of 32.
Use 1 as the next digit of our solution. 
Result so far: 1011.0
If we subtract 86 from 118, we get 32.
Bring next digit (1) of the dividend behind the 32 and repeat the process: 321 / 86

Advancing to step 6:
86 goes into 321 3 times with a remainder of 63.
Write down 3 as next digit of the result. 
Result so far: 10113.0
The remainder is 63 after subtracting 258 from 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 7:
86 can be fit into 630 7 times, resulting in a remainder of 28.
Put 7 as the next digit of the answer. 
Result so far: 10113.7
Subtracting 602 from 630 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 8:
If we divide 280 by 86, we get 3 and a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 10113.73
If we subtract 258 from 280, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 9:
The number 86 fits into 220 2 times, leaving a remainder of 48.
The next digit of our result is 2. 
Result so far: 10113.732
Subtracting 172 from 220 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 10:
When dividing 480 by 86, we get 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 10113.7325
Subtracting 430 from 480 leaves us 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.

Advancing to step 11:
500 divided by 86 is 5 with a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 10113.73255
Deduct 430 from 500 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

In conclusion, the division gives 10113.73255 with a balance of 7e-05.