We look at the division of 305309 by 17 
The aim is to understand the frequency of 17 in 305309.

Moving on to step 1:
3 divided by 17 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 17

On to step 2:
When dividing 30 by 17, we get 1 with a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 17 from 30 to get 13.
Include the next digit (5) from the dividend after 13, then repeat: 135 / 17

Let's proceed to step 3:
When dividing 135 by 17, we get 7 with a remainder of 16.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtract 119 from 135 to get 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 17

On to step 4:
17 goes into 163 9 times with a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 179.0
Deduct 153 from 163 and we're left with 10.
Fetch the next digit (0) from the dividend, attach it to 10 and continue: 100 / 17

Moving on to step 5:
The number 17 fits into 100 5 times, leaving a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 1795.0
Deduct 85 from 100 and we're left with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 17

On to step 6:
The number 17 fits into 159 9 times, leaving a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 17959.0
Deduct 153 from 159 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.

Let's proceed to step 7:
The number 17 fits into 60 3 times, leaving a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 17959.3
Subtract 51 from 60 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 8:
90 divided by 17 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 17959.35
If we subtract 85 from 90, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 9:
If we divide 50 by 17, we get 2 and a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 17959.352
Deduct 34 from 50 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.

On to step 10:
160 divided by 17 is 9 with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 17959.3529
Deduct 153 from 160 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 11:
When dividing 70 by 17, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 17959.35294
Subtract 68 from 70 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 12:
If we divide 20 by 17, we get 1 and a remainder of 3.
The next digit of our result is 1. 
Result so far: 17959.352941
The remainder is 3 after subtracting 17 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 13:
17 can be fit into 30 1 times, resulting in a remainder of 13.
The next digit of our result is 1. 
Result so far: 17959.3529411
If we take 17 away from 30, we end up 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.

The final outcome is 17959.3529411, with a leftover of 1.3e-07.