We're dividing 628451 by 86 
The aim is to understand the frequency of 86 in 628451.

Moving on to step 1:
86 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 86

Going ahead to step 2:
If we divide 62 by 86, we get 0 and a remainder of 62.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 62, we get 62.
Append the next digit (8) from the dividend to 62 and continue with: 628 / 86

Moving on to step 3:
If we divide 628 by 86, we get 7 and a remainder of 26.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 602 from 628, we get 26.
Grab the next digit (4) from the dividend, add it to 26, then carry on: 264 / 86

Moving on to step 4:
When dividing 264 by 86, we get 3 with a remainder of 6.
The next digit of our result is 3. 
Result so far: 73.0
Subtract 258 from 264 to get 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 86

Going ahead to step 5:
The number 86 fits into 65 0 times, leaving a remainder of 65.
Write down 0 as next digit of the result. 
Result so far: 730.0
Deduct 0 from 65 and we're left with 65.
Grab the next digit (1) from the dividend, add it to 65, then carry on: 651 / 86

Going ahead to step 6:
The number 86 fits into 651 7 times, leaving a remainder of 49.
The next digit of our result is 7. 
Result so far: 7307.0
The remainder is 49 after subtracting 602 from 651.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 7:
The number 86 fits into 490 5 times, leaving a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 7307.5
Subtract 430 from 490 to get 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:
600 divided by 86 is 6 with a remainder of 84.
Record the quotient 6 as the next digit in the result. 
Result so far: 7307.56
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.

On to step 9:
86 goes into 840 9 times with a remainder of 66.
Record the quotient 9 as the next digit in the result. 
Result so far: 7307.569
If we take 774 away from 840, we end up 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.

Advancing to step 10:
If we divide 660 by 86, we get 7 and a remainder of 58.
Write down 7 as next digit of the result. 
Result so far: 7307.5697
Deduct 602 from 660 and we're left 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.

Advancing 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: 7307.56976
The remainder is 64 after subtracting 516 from 580.
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 12:
The number 86 fits into 640 7 times, leaving a remainder of 38.
The next digit of our result is 7. 
Result so far: 7307.569767
If we subtract 602 from 640, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 13:
380 divided by 86 is 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 7307.5697674
The remainder is 36 after subtracting 344 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 14:
If we divide 360 by 86, we get 4 and a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 7307.56976744
If we take 344 away from 360, we end up 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.

The final result is 7307.56976744 with a remainder of 1.6e-08.