We look at the division of 561670 by 86 
The aim is to understand the frequency of 86 in 561670.

Moving on to step 1:
86 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 86

Let's proceed to step 2:
If we divide 56 by 86, we get 0 and a remainder of 56.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 56 and we're left with 56.
Include the next digit (1) from the dividend after 56, then repeat: 561 / 86

Going ahead to step 3:
561 divided by 86 is 6 with a remainder of 45.
The next digit of our result is 6. 
Result so far: 6.0
The remainder is 45 after subtracting 516 from 561.
Take the next digit (6) from the dividend and append it to 45, then repeat: 456 / 86

On to step 4:
When dividing 456 by 86, we get 5 with a remainder of 26.
Write down 5 as next digit of the result. 
Result so far: 65.0
Deduct 430 from 456 and we're left with 26.
Take the next digit (7) from the dividend and append it to 26, then repeat: 267 / 86

Going ahead to step 5:
The number 86 fits into 267 3 times, leaving a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 653.0
The remainder is 9 after subtracting 258 from 267.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 86

Going ahead to step 6:
If we divide 90 by 86, we get 1 and a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 6531.0
Subtracting 86 from 90 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.

Moving on to step 7:
If we divide 40 by 86, we get 0 and a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 6531.0
If we subtract 0 from 40, we get 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 8:
If we divide 400 by 86, we get 4 and a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 6531.04
Subtract 344 from 400 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 9:
When dividing 560 by 86, we get 6 with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 6531.046
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.

Going ahead to step 10:
86 goes into 440 5 times with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 6531.0465
Subtract 430 from 440 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 11:
If we divide 100 by 86, we get 1 and a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 6531.04651
If we subtract 86 from 100, we 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.

Step 12:
140 divided by 86 is 1 with a remainder of 54.
The next digit of our result is 1. 
Result so far: 6531.046511
If we take 86 away from 140, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final outcome is 6531.046511, with a leftover of 5.4e-06.