We're dividing 909707 by 3 
The aim is to understand the frequency of 3 in 909707.

On to step 1:
3 goes into 9 3 times with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 9 away from 9, we end up with 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 3

Let's proceed to step 2:
If we divide 0 by 3, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 30.0
If we take 0 away from 0, we end up with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 3

Going ahead to step 3:
3 goes into 9 3 times with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 303.0
If we subtract 9 from 9, we get 0.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 3

Step 4:
7 divided by 3 is 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 3032.0
If we take 6 away from 7, we end up with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 3

On to step 5:
3 goes into 10 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 30323.0
Subtracting 9 from 10 leaves us with 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 3

On to step 6:
When dividing 17 by 3, we get 5 with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 303235.0
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.
Use 6 as the next digit of our solution. 
Result so far: 303235.6
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.

On to step 8:
3 goes into 20 6 times with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 303235.66
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.

The final result is 303235.66 with a remainder of 0.002.