We look at the division of 717437 by 3 
The aim is to understand the frequency of 3 in 717437.

Moving on to step 1:
7 divided by 3 is 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 6 from 7 leaves us with 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 3

Step 2:
When dividing 11 by 3, we get 3 with a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
Deduct 9 from 11 and we're left with 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 3

On to step 3:
The number 3 fits into 27 9 times, leaving a remainder of 0.
The next digit of our result is 9. 
Result so far: 239.0
If we take 27 away from 27, we end up with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 3

Advancing to step 4:
The number 3 fits into 4 1 times, leaving a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 2391.0
If we take 3 away from 4, we end up with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 3

Advancing to step 5:
13 divided by 3 is 4 with a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 23914.0
The remainder is 1 after subtracting 12 from 13.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 3

Step 6:
3 goes into 17 5 times with a remainder of 2.
Record the quotient 5 as the next digit in the result. 
Result so far: 239145.0
If we subtract 15 from 17, we 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.

Going ahead to step 7:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 239145.6
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
When dividing 20 by 3, we get 6 with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 239145.66
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 239145.66 with a remaining 0.002.