Let's divide 210645 by 17
The aim is to understand the frequency of 17 in 210645.

Moving on to step 1:
When dividing 2 by 17, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 17

On to step 2:
When dividing 21 by 17, we get 1 with a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 17 from 21 and we're left with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 17

Advancing to step 3:
If we divide 40 by 17, we get 2 and a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 34 from 40 and we're left with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 17

Advancing to step 4:
17 can be fit into 66 3 times, resulting in a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 123.0
Subtracting 51 from 66 leaves us with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 17

Let's proceed to step 5:
When dividing 154 by 17, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 1239.0
Subtracting 153 from 154 leaves us with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 17

Moving on to step 6:
The number 17 fits into 15 0 times, leaving a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 12390.0
Subtract 0 from 15 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:
150 divided by 17 is 8 with a remainder of 14.
Write down 8 as next digit of the result. 
Result so far: 12390.8
If we take 136 away from 150, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 8:
If we divide 140 by 17, we get 8 and a remainder of 4.
The next digit of our result is 8. 
Result so far: 12390.88
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.

Our division results in 12390.88 with a remaining 0.004.