We're dividing 689891 by 86 
The aim is to understand the frequency of 86 in 689891.

Moving on to step 1:
6 divided by 86 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 86

Advancing to step 2:
86 can be fit into 68 0 times, resulting in a remainder of 68.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 68 after subtracting 0 from 68.
Grab the next digit (9) from the dividend, add it to 68, then carry on: 689 / 86

Let's proceed to step 3:
If we divide 689 by 86, we get 8 and a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 688 from 689 to get 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 86

Moving on to step 4:
When dividing 18 by 86, we get 0 with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 80.0
Subtracting 0 from 18 leaves us with 18.
Fetch the next digit (9) from the dividend, attach it to 18 and continue: 189 / 86

Moving on to step 5:
189 divided by 86 is 2 with a remainder of 17.
Use 2 as the next digit of our solution. 
Result so far: 802.0
The remainder is 17 after subtracting 172 from 189.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 86

Going ahead to step 6:
If we divide 171 by 86, we get 1 and a remainder of 85.
Record the quotient 1 as the next digit in the result. 
Result so far: 8021.0
Deduct 86 from 171 and we're left with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 7:
If we divide 850 by 86, we get 9 and a remainder of 76.
The number 9 becomes the next digit in our result. 
Result so far: 8021.9
If we subtract 774 from 850, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 8:
If we divide 760 by 86, we get 8 and a remainder of 72.
The number 8 becomes the next digit in our result. 
Result so far: 8021.98
The remainder is 72 after subtracting 688 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 9:
The number 86 fits into 720 8 times, leaving a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 8021.988
If we take 688 away from 720, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 8021.988 and a remainder of 0.0032.