We look at the division of 339458 by 86 
The aim is to understand the frequency of 86 in 339458.

Let's proceed to step 1:
When dividing 3 by 86, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 86

Let's proceed to step 2:
If we divide 33 by 86, we get 0 and a remainder of 33.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 33, we end up with 33.
Include the next digit (9) from the dividend after 33, then repeat: 339 / 86

On to step 3:
When dividing 339 by 86, we get 3 with a remainder of 81.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 258 away from 339, we end up with 81.
Append the next digit (4) from the dividend to 81 and continue with: 814 / 86

Moving on to step 4:
When dividing 814 by 86, we get 9 with a remainder of 40.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
If we subtract 774 from 814, we get 40.
Grab the next digit (5) from the dividend, add it to 40, then carry on: 405 / 86

Advancing to step 5:
86 can be fit into 405 4 times, resulting in a remainder of 61.
The number 4 becomes the next digit in our result. 
Result so far: 394.0
Subtracting 344 from 405 leaves us with 61.
Grab the next digit (8) from the dividend, add it to 61, then carry on: 618 / 86

Step 6:
When dividing 618 by 86, we get 7 with a remainder of 16.
Record the quotient 7 as the next digit in the result. 
Result so far: 3947.0
If we subtract 602 from 618, 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.

Step 7:
160 divided by 86 is 1 with a remainder of 74.
Record the quotient 1 as the next digit in the result. 
Result so far: 3947.1
Subtracting 86 from 160 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 8:
When dividing 740 by 86, we get 8 with a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 3947.18
Subtracting 688 from 740 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 9:
If we divide 520 by 86, we get 6 and a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 3947.186
Subtracting 516 from 520 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
86 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 3947.186
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 11:
400 divided by 86 is 4 with a remainder of 56.
Put 4 as the next digit of the answer. 
Result so far: 3947.18604
Subtracting 344 from 400 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 12:
When dividing 560 by 86, we get 6 with a remainder of 44.
The next digit of our result is 6. 
Result so far: 3947.186046
If we subtract 516 from 560, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 13:
When dividing 440 by 86, we get 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 3947.1860465
The remainder is 10 after subtracting 430 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 14:
86 can be fit into 100 1 times, resulting in a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 3947.18604651
Subtract 86 from 100 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

After the division, we end up with 3947.18604651 and a remainder of 1.4e-08.