We're dividing 661759 by 86 
The aim is to understand the frequency of 86 in 661759.

On to step 1:
86 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 86

Let's proceed to step 2:
86 can be fit into 66 0 times, resulting in a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Grab the next digit (1) from the dividend, add it to 66, then carry on: 661 / 86

Moving on to step 3:
When dividing 661 by 86, we get 7 with a remainder of 59.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 602 from 661 to get 59.
Take the next digit (7) from the dividend and append it to 59, then repeat: 597 / 86

Step 4:
597 divided by 86 is 6 with a remainder of 81.
Use 6 as the next digit of our solution. 
Result so far: 76.0
If we subtract 516 from 597, we get 81.
Take the next digit (5) from the dividend and append it to 81, then repeat: 815 / 86

On to step 5:
When dividing 815 by 86, we get 9 with a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 769.0
If we take 774 away from 815, we end up with 41.
Grab the next digit (9) from the dividend, add it to 41, then carry on: 419 / 86

On to step 6:
86 goes into 419 4 times with a remainder of 75.
Put 4 as the next digit of the answer. 
Result so far: 7694.0
The remainder is 75 after subtracting 344 from 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 7:
86 can be fit into 750 8 times, resulting in a remainder of 62.
Write down 8 as next digit of the result. 
Result so far: 7694.8
The remainder is 62 after subtracting 688 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 8:
The number 86 fits into 620 7 times, leaving a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 7694.87
Subtract 602 from 620 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 9:
When dividing 180 by 86, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 7694.872
Deduct 172 from 180 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
If we divide 80 by 86, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 7694.872
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 11:
86 can be fit into 800 9 times, resulting in a remainder of 26.
Use 9 as the next digit of our solution. 
Result so far: 7694.87209
Deduct 774 from 800 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 12:
86 goes into 260 3 times with a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 7694.872093
Subtract 258 from 260 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 13:
When dividing 20 by 86, we get 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 7694.872093
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 14:
When dividing 200 by 86, we get 2 with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 7694.87209302
If we subtract 172 from 200, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

In conclusion, the division gives 7694.87209302 with a balance of 2.8e-08.