We look at the division of 171919 by 2 
The aim is to understand the frequency of 2 in 171919.

On to step 1:
2 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 2

On to step 2:
The number 2 fits into 17 8 times, leaving a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 16 away from 17, we end up with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 2

Going ahead to step 3:
If we divide 11 by 2, we get 5 and a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 85.0
If we subtract 10 from 11, we get 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 2

Step 4:
When dividing 19 by 2, we get 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 859.0
If we subtract 18 from 19, we get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 2

Moving on to step 5:
When dividing 11 by 2, we get 5 with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 8595.0
If we subtract 10 from 11, we get 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 2

Let's proceed to step 6:
19 divided by 2 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 85959.0
If we subtract 18 from 19, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
2 goes into 10 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 85959.5
The remainder is 0 after subtracting 10 from 10.
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 8:
2 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 85959.5
The remainder is 0 after subtracting 0 from 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 9:
When dividing 0 by 2, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 85959.5
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 85959.5 with a remaining 0.0.