We look at the division of 86346 by 77 
The aim is to understand the frequency of 77 in 86346.

Advancing to step 1:
If we divide 8 by 77, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 77

Advancing to step 2:
The number 77 fits into 86 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 77 from 86 leaves us with 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 77

Step 3:
77 goes into 93 1 times with a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we subtract 77 from 93, we get 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 77

On to step 4:
77 goes into 164 2 times with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 112.0
The remainder is 10 after subtracting 154 from 164.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 77

Advancing to step 5:
77 can be fit into 106 1 times, resulting in a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 1121.0
Subtracting 77 from 106 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 6:
77 can be fit into 290 3 times, resulting in a remainder of 59.
The number 3 becomes the next digit in our result. 
Result so far: 1121.3
Deduct 231 from 290 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 7:
77 goes into 590 7 times with a remainder of 51.
Put 7 as the next digit of the answer. 
Result so far: 1121.37
Subtract 539 from 590 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 8:
The number 77 fits into 510 6 times, leaving a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 1121.376
Subtract 462 from 510 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 9:
The number 77 fits into 480 6 times, leaving a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 1121.3766
The remainder is 18 after subtracting 462 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 1121.3766 with a remaining 0.00018.