We look at the division of 617578 by 86 
The aim is to understand the frequency of 86 in 617578.

Let's proceed to step 1:
When dividing 6 by 86, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 86

Step 2:
The number 86 fits into 61 0 times, leaving a remainder of 61.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 61 leaves us with 61.
Fetch the next digit (7) from the dividend, attach it to 61 and continue: 617 / 86

Advancing to step 3:
If we divide 617 by 86, we get 7 and a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 602 from 617, we get 15.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 86

On to step 4:
If we divide 155 by 86, we get 1 and a remainder of 69.
The next digit of our result is 1. 
Result so far: 71.0
If we subtract 86 from 155, we get 69.
Append the next digit (7) from the dividend to 69 and continue with: 697 / 86

Moving on to step 5:
If we divide 697 by 86, we get 8 and a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 718.0
Subtract 688 from 697 to get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 86

Step 6:
86 can be fit into 98 1 times, resulting in a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 7181.0
The remainder is 12 after subtracting 86 from 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
86 can be fit into 120 1 times, resulting in a remainder of 34.
Write down 1 as next digit of the result. 
Result so far: 7181.1
Subtracting 86 from 120 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 8:
86 goes into 340 3 times with a remainder of 82.
The next digit of our result is 3. 
Result so far: 7181.13
If we take 258 away from 340, we end up with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 9:
If we divide 820 by 86, we get 9 and a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 7181.139
Subtracting 774 from 820 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 10:
86 can be fit into 460 5 times, resulting in a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 7181.1395
Subtract 430 from 460 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
300 divided by 86 is 3 with a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 7181.13953
Deduct 258 from 300 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 12:
86 can be fit into 420 4 times, resulting in a remainder of 76.
Use 4 as the next digit of our solution. 
Result so far: 7181.139534
The remainder is 76 after subtracting 344 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 13:
86 goes into 760 8 times with a remainder of 72.
Use 8 as the next digit of our solution. 
Result so far: 7181.1395348
Deduct 688 from 760 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 14:
86 goes into 720 8 times with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 7181.13953488
If we take 688 away from 720, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 7181.13953488 and a remainder of 3.2e-08.