We're dividing 159012 by 17 
The aim is to understand the frequency of 17 in 159012.

On to step 1:
1 divided by 17 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 17

Moving on to step 2:
15 divided by 17 is 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 17

Step 3:
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: 9.0
Subtracting 153 from 159 leaves us with 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 17

Step 4:
17 goes into 60 3 times with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 93.0
If we subtract 51 from 60, we get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 17

Moving on to step 5:
17 goes into 91 5 times with a remainder of 6.
Write down 5 as next digit of the result. 
Result so far: 935.0
If we subtract 85 from 91, we get 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 17

On to step 6:
If we divide 62 by 17, we get 3 and a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 9353.0
Subtract 51 from 62 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
110 divided by 17 is 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 9353.6
The remainder is 8 after subtracting 102 from 110.
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 8:
17 goes into 80 4 times with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 9353.64
Subtracting 68 from 80 leaves us 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.

Advancing to step 9:
17 goes into 120 7 times with a remainder of 1.
The next digit of our result is 7. 
Result so far: 9353.647
If we take 119 away from 120, we end up 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.

Step 10:
When dividing 10 by 17, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 9353.647
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.

Step 11:
If we divide 100 by 17, we get 5 and a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 9353.64705
Subtract 85 from 100 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 12:
150 divided by 17 is 8 with a remainder of 14.
The next digit of our result is 8. 
Result so far: 9353.647058
Subtract 136 from 150 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 13:
140 divided by 17 is 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 9353.6470588
Deduct 136 from 140 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.

The final outcome is 9353.6470588, with a leftover of 4e-08.