815286 ÷ 17 
The aim is to understand the frequency of 17 in 815286.

Moving on to step 1:
8 divided by 17 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 17

Step 2:
17 goes into 81 4 times with a remainder of 13.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 68 from 81, we get 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 17

Step 3:
17 can be fit into 135 7 times, resulting in a remainder of 16.
Use 7 as the next digit of our solution. 
Result so far: 47.0
Deduct 119 from 135 and we're left with 16.
Grab the next digit (2) from the dividend, add it to 16, then carry on: 162 / 17

Advancing to step 4:
17 can be fit into 162 9 times, resulting in a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 479.0
Subtracting 153 from 162 leaves us with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 17

On to step 5:
17 goes into 98 5 times with a remainder of 13.
The number 5 becomes the next digit in our result. 
Result so far: 4795.0
Deduct 85 from 98 and we're left with 13.
Append the next digit (6) from the dividend to 13 and continue with: 136 / 17

Step 6:
136 divided by 17 is 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 47958.0
Subtract 136 from 136 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
0 divided by 17 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 47958.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
0 divided by 17 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 47958.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 47958.0 and a remainder of 0.0.