169959 ÷ 86 
The aim is to understand the frequency of 86 in 169959.

Let's proceed to step 1:
If we divide 1 by 86, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 86

Advancing to step 2:
If we divide 16 by 86, we get 0 and a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Append the next digit (9) from the dividend to 16 and continue with: 169 / 86

Step 3:
169 divided by 86 is 1 with a remainder of 83.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 83 after subtracting 86 from 169.
Take the next digit (9) from the dividend and append it to 83, then repeat: 839 / 86

Moving on to step 4:
When dividing 839 by 86, we get 9 with a remainder of 65.
The next digit of our result is 9. 
Result so far: 19.0
Subtract 774 from 839 to get 65.
Bring next digit (5) of the dividend behind the 65 and repeat the process: 655 / 86

Let's proceed to step 5:
When dividing 655 by 86, we get 7 with a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 197.0
If we take 602 away from 655, we end up with 53.
Take the next digit (9) from the dividend and append it to 53, then repeat: 539 / 86

Let's proceed to step 6:
The number 86 fits into 539 6 times, leaving a remainder of 23.
Use 6 as the next digit of our solution. 
Result so far: 1976.0
Subtracting 516 from 539 leaves us 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.

Moving on to step 7:
When dividing 230 by 86, we get 2 with a remainder of 58.
The next digit of our result is 2. 
Result so far: 1976.2
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.

Let's proceed to step 8:
580 divided by 86 is 6 with a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 1976.26
Subtracting 516 from 580 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 9:
The number 86 fits into 640 7 times, leaving a remainder of 38.
The next digit of our result is 7. 
Result so far: 1976.267
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:
The number 86 fits into 380 4 times, leaving a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 1976.2674
If we subtract 344 from 380, we 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.

On to step 11:
If we divide 360 by 86, we get 4 and a remainder of 16.
The next digit of our result is 4. 
Result so far: 1976.26744
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 final outcome is 1976.26744, with a leftover of 1.6e-05.