We look at the division of 713573 by 17 
The aim is to understand the frequency of 17 in 713573.

On to step 1:
The number 17 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 17

Step 2:
The number 17 fits into 71 4 times, leaving a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 68 from 71 to get 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 17

Advancing to step 3:
The number 17 fits into 33 1 times, leaving a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 41.0
If we take 17 away from 33, we end up with 16.
Append the next digit (5) from the dividend to 16 and continue with: 165 / 17

Moving on to step 4:
When dividing 165 by 17, we get 9 with a remainder of 12.
The next digit of our result is 9. 
Result so far: 419.0
Subtract 153 from 165 to get 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 17

Advancing to step 5:
17 goes into 127 7 times with a remainder of 8.
Write down 7 as next digit of the result. 
Result so far: 4197.0
If we subtract 119 from 127, we get 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 17

On to step 6:
83 divided by 17 is 4 with a remainder of 15.
Write down 4 as next digit of the result. 
Result so far: 41974.0
Subtract 68 from 83 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.

Moving on to step 7:
If we divide 150 by 17, we get 8 and a remainder of 14.
Record the quotient 8 as the next digit in the result. 
Result so far: 41974.8
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.

Moving on to step 8:
17 can be fit into 140 8 times, resulting in a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 41974.88
Subtract 136 from 140 to 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.

After the division, we end up with 41974.88 and a remainder of 0.004.