We divide 872580 by 17
The aim is to understand the frequency of 17 in 872580.

Going ahead to step 1:
The number 17 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 17

Step 2:
When dividing 87 by 17, we get 5 with a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 85 from 87 and we're left with 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 17

Let's proceed to step 3:
17 can be fit into 22 1 times, resulting in a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 51.0
If we take 17 away from 22, we end up with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 17

Moving on to step 4:
17 can be fit into 55 3 times, resulting in a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 513.0
If we subtract 51 from 55, we get 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 17

Step 5:
The number 17 fits into 48 2 times, leaving a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 5132.0
Subtracting 34 from 48 leaves us with 14.
Append the next digit (0) from the dividend to 14 and continue with: 140 / 17

On to step 6:
The number 17 fits into 140 8 times, leaving a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 51328.0
If we subtract 136 from 140, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
40 divided by 17 is 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 51328.2
If we subtract 34 from 40, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
17 goes into 60 3 times with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 51328.23
Deduct 51 from 60 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 9:
17 goes into 90 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 51328.235
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.

On to step 10:
When dividing 50 by 17, we get 2 with a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 51328.2352
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 11:
When dividing 160 by 17, we get 9 with a remainder of 7.
The next digit of our result is 9. 
Result so far: 51328.23529
The remainder is 7 after subtracting 153 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 12:
70 divided by 17 is 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 51328.235294
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.

Advancing to step 13:
17 goes into 20 1 times with a remainder of 3.
The next digit of our result is 1. 
Result so far: 51328.2352941
If we subtract 17 from 20, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 14:
17 goes into 30 1 times with a remainder of 13.
The number 1 becomes the next digit in our result. 
Result so far: 51328.23529411
Deduct 17 from 30 and we're left 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.

After the division, we end up with 51328.23529411 and a remainder of 1.3e-08.