912180 divided by 86 
The aim is to understand the frequency of 86 in 912180.

On to step 1:
9 divided by 86 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 86

Moving on to step 2:
When dividing 91 by 86, we get 1 with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 86 from 91 leaves us with 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 86

Moving on to step 3:
The number 86 fits into 52 0 times, leaving a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtract 0 from 52 to get 52.
Bring next digit (1) of the dividend behind the 52 and repeat the process: 521 / 86

Moving on to step 4:
When dividing 521 by 86, we get 6 with a remainder of 5.
The next digit of our result is 6. 
Result so far: 106.0
Subtract 516 from 521 to get 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 86

Let's proceed to step 5:
When dividing 58 by 86, we get 0 with a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 1060.0
The remainder is 58 after subtracting 0 from 58.
Bring next digit (0) of the dividend behind the 58 and repeat the process: 580 / 86

Step 6:
86 goes into 580 6 times with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 10606.0
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.

Step 7:
86 can be fit into 640 7 times, resulting in a remainder of 38.
The next digit of our result is 7. 
Result so far: 10606.7
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.

Moving on to step 8:
When dividing 380 by 86, we get 4 with a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 10606.74
Subtracting 344 from 380 leaves us 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.

Advancing to step 9:
86 goes into 360 4 times with a remainder of 16.
The next digit of our result is 4. 
Result so far: 10606.744
If we subtract 344 from 360, 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.

Our division results in 10606.744 with a remaining 0.0016.