We look at the division of 171599 by 14 
The aim is to understand the frequency of 14 in 171599.

Going ahead to step 1:
14 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 14

Step 2:
When dividing 17 by 14, we get 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 14 from 17, we get 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 14

Going ahead to step 3:
The number 14 fits into 31 2 times, leaving a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtract 28 from 31 to get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 14

Step 4:
14 goes into 35 2 times with a remainder of 7.
Put 2 as the next digit of the answer. 
Result so far: 122.0
If we take 28 away from 35, we end up with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 14

Advancing to step 5:
14 goes into 79 5 times with a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 1225.0
If we subtract 70 from 79, we get 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 14

On to step 6:
14 can be fit into 99 7 times, resulting in a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 12257.0
Subtracting 98 from 99 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
When dividing 10 by 14, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 12257.0
If we subtract 0 from 10, we 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.

Going ahead to step 8:
14 can be fit into 100 7 times, resulting in a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 12257.07
Subtract 98 from 100 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
20 divided by 14 is 1 with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 12257.071
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 10:
14 goes into 60 4 times with a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 12257.0714
Subtracting 56 from 60 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.

Let's proceed to step 11:
40 divided by 14 is 2 with a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 12257.07142
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.

Step 12:
14 can be fit into 120 8 times, resulting in a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 12257.071428
Subtract 112 from 120 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
If we divide 80 by 14, we get 5 and a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 12257.0714285
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.

Let's proceed to step 14:
14 can be fit into 100 7 times, resulting in a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 12257.07142857
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.

Our division results in 12257.07142857 with a remaining 2e-09.