Let's divide 81591 by 14
The aim is to understand the frequency of 14 in 81591.

Going ahead to step 1:
8 divided by 14 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 14

Step 2:
When dividing 81 by 14, we get 5 with a remainder of 11.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 70 from 81 leaves us with 11.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 14

Going ahead to step 3:
14 can be fit into 115 8 times, resulting in a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 58.0
Subtract 112 from 115 to get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 14

Let's proceed to step 4:
14 goes into 39 2 times with a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 582.0
Subtracting 28 from 39 leaves us with 11.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 14

Let's proceed to step 5:
14 goes into 111 7 times with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 5827.0
Deduct 98 from 111 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 6:
14 goes into 130 9 times with a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 5827.9
Subtract 126 from 130 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 7:
14 can be fit into 40 2 times, resulting in a remainder of 12.
The next digit of our result is 2. 
Result so far: 5827.92
The remainder is 12 after subtracting 28 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
When dividing 120 by 14, we get 8 with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 5827.928
Subtracting 112 from 120 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
The number 14 fits into 80 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 5827.9285
If we take 70 away from 80, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
If we divide 100 by 14, we get 7 and a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 5827.92857
If we take 98 away from 100, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
When dividing 20 by 14, we get 1 with a remainder of 6.
Put 1 as the next digit of the answer. 
Result so far: 5827.928571
Deduct 14 from 20 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 12:
60 divided by 14 is 4 with a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 5827.9285714
Deduct 56 from 60 and we're left 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.

Going ahead to step 13:
If we divide 40 by 14, we get 2 and a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 5827.92857142
If we take 28 away from 40, 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.

The quotient of the division is 5827.92857142, and the remainder is 1.2e-08.