We look at the division of 308368 by 3 
The aim is to understand the frequency of 3 in 308368.

Step 1:
When dividing 3 by 3, we get 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 3 from 3, we get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 3

Step 2:
3 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtract 0 from 0 to get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 3

Advancing to step 3:
When dividing 8 by 3, we get 2 with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 102.0
Subtracting 6 from 8 leaves us with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 3

On to step 4:
The number 3 fits into 23 7 times, leaving a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 1027.0
Subtract 21 from 23 to get 2.
Grab the next digit (6) from the dividend, add it to 2, then carry on: 26 / 3

Step 5:
3 can be fit into 26 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 10278.0
If we take 24 away from 26, we end up with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 3

On to step 6:
3 goes into 28 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 102789.0
Subtract 27 from 28 to 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.

On to step 7:
If we divide 10 by 3, we get 3 and a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 102789.3
The remainder is 1 after subtracting 9 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 8:
If we divide 10 by 3, we get 3 and a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 102789.33
The remainder is 1 after subtracting 9 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 102789.33, with a leftover of 0.001.