We're dividing 659643 by 86 
The aim is to understand the frequency of 86 in 659643.

Going ahead to step 1:
6 divided by 86 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 86

Advancing to step 2:
The number 86 fits into 65 0 times, leaving a remainder of 65.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 65, we end up with 65.
Append the next digit (9) from the dividend to 65 and continue with: 659 / 86

Moving on to step 3:
If we divide 659 by 86, we get 7 and a remainder of 57.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 602 from 659, we get 57.
Bring next digit (6) of the dividend behind the 57 and repeat the process: 576 / 86

Let's proceed to step 4:
86 goes into 576 6 times with a remainder of 60.
The next digit of our result is 6. 
Result so far: 76.0
Subtract 516 from 576 to get 60.
Append the next digit (4) from the dividend to 60 and continue with: 604 / 86

Going ahead to step 5:
86 can be fit into 604 7 times, resulting in a remainder of 2.
The next digit of our result is 7. 
Result so far: 767.0
If we take 602 away from 604, we end up with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 86

Advancing to step 6:
If we divide 23 by 86, we get 0 and a remainder of 23.
Write down 0 as next digit of the result. 
Result so far: 7670.0
If we take 0 away from 23, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 7:
If we divide 230 by 86, we get 2 and a remainder of 58.
Record the quotient 2 as the next digit in the result. 
Result so far: 7670.2
Subtracting 172 from 230 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 8:
86 can be fit into 580 6 times, resulting in a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 7670.26
The remainder is 64 after subtracting 516 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 9:
86 can be fit into 640 7 times, resulting in a remainder of 38.
Put 7 as the next digit of the answer. 
Result so far: 7670.267
If we take 602 away from 640, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 10:
When dividing 380 by 86, we get 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 7670.2674
Subtract 344 from 380 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
The number 86 fits into 360 4 times, leaving a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 7670.26744
Subtract 344 from 360 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 7670.26744, and the remainder is 1.6e-05.