We divide 939964 by 86
The aim is to understand the frequency of 86 in 939964.

Advancing to step 1:
If we divide 9 by 86, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 86

Moving on to step 2:
If we divide 93 by 86, we get 1 and a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 86 from 93, we get 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 86

Advancing to step 3:
If we divide 79 by 86, we get 0 and a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 79, we get 79.
Fetch the next digit (9) from the dividend, attach it to 79 and continue: 799 / 86

Advancing to step 4:
If we divide 799 by 86, we get 9 and a remainder of 25.
Record the quotient 9 as the next digit in the result. 
Result so far: 109.0
Subtracting 774 from 799 leaves us with 25.
Append the next digit (6) from the dividend to 25 and continue with: 256 / 86

Moving on to step 5:
The number 86 fits into 256 2 times, leaving a remainder of 84.
Record the quotient 2 as the next digit in the result. 
Result so far: 1092.0
If we subtract 172 from 256, we get 84.
Take the next digit (4) from the dividend and append it to 84, then repeat: 844 / 86

Let's proceed to step 6:
86 goes into 844 9 times with a remainder of 70.
The number 9 becomes the next digit in our result. 
Result so far: 10929.0
If we subtract 774 from 844, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 7:
The number 86 fits into 700 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 10929.8
If we take 688 away from 700, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 8:
86 goes into 120 1 times with a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 10929.81
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.

Step 9:
If we divide 340 by 86, we get 3 and a remainder of 82.
Put 3 as the next digit of the answer. 
Result so far: 10929.813
Subtract 258 from 340 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 10:
When dividing 820 by 86, we get 9 with a remainder of 46.
The next digit of our result is 9. 
Result so far: 10929.8139
If we subtract 774 from 820, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 11:
86 goes into 460 5 times with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 10929.81395
Subtracting 430 from 460 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 12:
If we divide 300 by 86, we get 3 and a remainder of 42.
The number 3 becomes the next digit in our result. 
Result so far: 10929.813953
If we subtract 258 from 300, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 13:
420 divided by 86 is 4 with a remainder of 76.
The next digit of our result is 4. 
Result so far: 10929.8139534
If we subtract 344 from 420, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 14:
86 goes into 760 8 times with a remainder of 72.
The next digit of our result is 8. 
Result so far: 10929.81395348
Subtracting 688 from 760 leaves us 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.

The final outcome is 10929.81395348, with a leftover of 7.2e-08.