351359 divided by 86 
The aim is to understand the frequency of 86 in 351359.

On to step 1:
If we divide 3 by 86, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 86

Moving on to step 2:
When dividing 35 by 86, we get 0 with a remainder of 35.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Take the next digit (1) from the dividend and append it to 35, then repeat: 351 / 86

On to step 3:
If we divide 351 by 86, we get 4 and a remainder of 7.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 344 from 351 to get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 86

Step 4:
86 goes into 73 0 times with a remainder of 73.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
Subtracting 0 from 73 leaves us with 73.
Bring next digit (5) of the dividend behind the 73 and repeat the process: 735 / 86

On to step 5:
735 divided by 86 is 8 with a remainder of 47.
The number 8 becomes the next digit in our result. 
Result so far: 408.0
The remainder is 47 after subtracting 688 from 735.
Bring next digit (9) of the dividend behind the 47 and repeat the process: 479 / 86

Moving on to step 6:
86 goes into 479 5 times with a remainder of 49.
Use 5 as the next digit of our solution. 
Result so far: 4085.0
If we take 430 away from 479, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 7:
The number 86 fits into 490 5 times, leaving a remainder of 60.
Use 5 as the next digit of our solution. 
Result so far: 4085.5
Deduct 430 from 490 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
86 can be fit into 600 6 times, resulting in a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 4085.56
If we take 516 away from 600, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 9:
If we divide 840 by 86, we get 9 and a remainder of 66.
Record the quotient 9 as the next digit in the result. 
Result so far: 4085.569
Subtracting 774 from 840 leaves us 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 10:
660 divided by 86 is 7 with a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 4085.5697
Subtracting 602 from 660 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 11:
When dividing 580 by 86, we get 6 with a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 4085.56976
If we take 516 away from 580, we end up 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.

Let's proceed to step 12:
86 goes into 640 7 times with a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 4085.569767
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.

Going ahead to step 13:
380 divided by 86 is 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 4085.5697674
If we take 344 away from 380, we end up 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.

Step 14:
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: 4085.56976744
Deduct 344 from 360 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 4085.56976744 with a remaining 1.6e-08.