We're dividing 431687 by 17 
The aim is to understand the frequency of 17 in 431687.

On to step 1:
When dividing 4 by 17, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 17

Going ahead to step 2:
17 can be fit into 43 2 times, resulting in a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 34 away from 43, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 17

Let's proceed to step 3:
When dividing 91 by 17, we get 5 with a remainder of 6.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Deduct 85 from 91 and we're left with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 17

On to step 4:
66 divided by 17 is 3 with a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 253.0
The remainder is 15 after subtracting 51 from 66.
Fetch the next digit (8) from the dividend, attach it to 15 and continue: 158 / 17

Advancing to step 5:
If we divide 158 by 17, we get 9 and a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 2539.0
If we take 153 away from 158, we end up with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 17

Let's proceed to step 6:
57 divided by 17 is 3 with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 25393.0
Subtracting 51 from 57 leaves us 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:
17 can be fit into 60 3 times, resulting in a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 25393.3
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.

Going ahead to step 8:
The number 17 fits into 90 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 25393.35
Subtracting 85 from 90 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 9:
17 goes into 50 2 times with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 25393.352
The remainder is 16 after subtracting 34 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 10:
17 can be fit into 160 9 times, resulting in a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 25393.3529
If we subtract 153 from 160, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On 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: 25393.35294
The remainder is 2 after subtracting 68 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 12:
20 divided by 17 is 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 25393.352941
Deduct 17 from 20 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 13:
30 divided by 17 is 1 with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 25393.3529411
The remainder is 13 after subtracting 17 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

After the division, we end up with 25393.3529411 and a remainder of 1.3e-07.