We're dividing 308290 by 86 
The aim is to understand the frequency of 86 in 308290.

On to step 1:
When dividing 3 by 86, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 86

Let's proceed to step 2:
86 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 30 to get 30.
Include the next digit (8) from the dividend after 30, then repeat: 308 / 86

Advancing to step 3:
86 goes into 308 3 times with a remainder of 50.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 258 from 308 and we're left with 50.
Take the next digit (2) from the dividend and append it to 50, then repeat: 502 / 86

Going ahead to step 4:
86 can be fit into 502 5 times, resulting in a remainder of 72.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
Deduct 430 from 502 and we're left with 72.
Grab the next digit (9) from the dividend, add it to 72, then carry on: 729 / 86

Step 5:
729 divided by 86 is 8 with a remainder of 41.
Record the quotient 8 as the next digit in the result. 
Result so far: 358.0
Subtracting 688 from 729 leaves us with 41.
Fetch the next digit (0) from the dividend, attach it to 41 and continue: 410 / 86

Going ahead to step 6:
The number 86 fits into 410 4 times, leaving a remainder of 66.
Use 4 as the next digit of our solution. 
Result so far: 3584.0
Deduct 344 from 410 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 7:
If we divide 660 by 86, we get 7 and a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 3584.7
Subtract 602 from 660 to get 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:
If we divide 580 by 86, we get 6 and a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 3584.76
Subtract 516 from 580 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 9:
86 can be fit into 640 7 times, resulting in a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 3584.767
Subtracting 602 from 640 leaves us 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.

Going ahead to step 10:
380 divided by 86 is 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 3584.7674
Deduct 344 from 380 and we're left with 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:
86 can be fit into 360 4 times, resulting in a remainder of 16.
The next digit of our result is 4. 
Result so far: 3584.76744
If we subtract 344 from 360, we 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.

After the division, we end up with 3584.76744 and a remainder of 1.6e-05.