300507 ÷ 3 
The aim is to understand the frequency of 3 in 300507.

Step 1:
The number 3 fits into 3 1 times, leaving a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 3 from 3 and we're left with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 3

Going ahead to step 2:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 0, we get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 3

Moving on to step 3:
The number 3 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
If we subtract 0 from 0, we get 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 3

On to step 4:
5 divided by 3 is 1 with a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 1001.0
Deduct 3 from 5 and we're left with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 3

Going ahead to step 5:
If we divide 20 by 3, we get 6 and a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 10016.0
If we take 18 away from 20, we end up with 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 3

Let's proceed to step 6:
The number 3 fits into 27 9 times, leaving a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 100169.0
Subtracting 27 from 27 leaves us 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.

Moving on to step 7:
When dividing 0 by 3, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 100169.0
Subtracting 0 from 0 leaves us 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.

Advancing to step 8:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 100169.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 100169.0, with a leftover of 0.0.