We look at the division of 57120314 by 86 
The aim is to understand the frequency of 86 in 57120314.

Moving on to step 1:
When dividing 5 by 86, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 86

Step 2:
57 divided by 86 is 0 with a remainder of 57.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 57 and we're left with 57.
Append the next digit (1) from the dividend to 57 and continue with: 571 / 86

Moving on to step 3:
If we divide 571 by 86, we get 6 and a remainder of 55.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 516 from 571 and we're left with 55.
Append the next digit (2) from the dividend to 55 and continue with: 552 / 86

On to step 4:
86 goes into 552 6 times with a remainder of 36.
Record the quotient 6 as the next digit in the result. 
Result so far: 66.0
If we take 516 away from 552, we end up with 36.
Grab the next digit (0) from the dividend, add it to 36, then carry on: 360 / 86

Advancing to step 5:
86 can be fit into 360 4 times, resulting in a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 664.0
Subtracting 344 from 360 leaves us with 16.
Bring next digit (3) of the dividend behind the 16 and repeat the process: 163 / 86

Moving on to step 6:
86 goes into 163 1 times with a remainder of 77.
Use 1 as the next digit of our solution. 
Result so far: 6641.0
If we subtract 86 from 163, we get 77.
Take the next digit (1) from the dividend and append it to 77, then repeat: 771 / 86

Step 7:
When dividing 771 by 86, we get 8 with a remainder of 83.
Put 8 as the next digit of the answer. 
Result so far: 66418.0
Subtract 688 from 771 to get 83.
Grab the next digit (4) from the dividend, add it to 83, then carry on: 834 / 86

Let's proceed to step 8:
When dividing 834 by 86, we get 9 with a remainder of 60.
Write down 9 as next digit of the result. 
Result so far: 664189.0
Deduct 774 from 834 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.

Moving on to step 9:
86 goes into 600 6 times with a remainder of 84.
Record the quotient 6 as the next digit in the result. 
Result so far: 664189.6
If we subtract 516 from 600, we get 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 10:
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: 664189.69
The remainder is 66 after subtracting 774 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 11:
The number 86 fits into 660 7 times, leaving a remainder of 58.
The next digit of our result is 7. 
Result so far: 664189.697
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 12:
86 can be fit into 580 6 times, resulting in a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 664189.6976
Subtract 516 from 580 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 13:
86 can be fit into 640 7 times, resulting in a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 664189.69767
Subtracting 602 from 640 leaves us 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 14:
380 divided by 86 is 4 with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 664189.697674
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.

On to step 15:
If we divide 360 by 86, we get 4 and a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 664189.6976744
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.

After the division, we end up with 664189.6976744 and a remainder of 1.6e-07.