221909 ÷ 3 
The aim is to understand the frequency of 3 in 221909.

On to step 1:
3 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 3

On to step 2:
3 goes into 22 7 times with a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Deduct 21 from 22 and we're left with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 3

Going ahead to step 3:
If we divide 11 by 3, we get 3 and a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 73.0
Deduct 9 from 11 and we're left with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 3

Going ahead to step 4:
3 goes into 29 9 times with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 739.0
If we subtract 27 from 29, we get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 3

On to step 5:
3 can be fit into 20 6 times, resulting in a remainder of 2.
The next digit of our result is 6. 
Result so far: 7396.0
If we subtract 18 from 20, we get 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 3

On to step 6:
3 goes into 29 9 times with a remainder of 2.
The next digit of our result is 9. 
Result so far: 73969.0
If we take 27 away from 29, we end up 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.

Moving on to step 7:
20 divided by 3 is 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 73969.6
If we take 18 away from 20, we end up 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.

Let's proceed to step 8:
If we divide 20 by 3, we get 6 and a remainder of 2.
The next digit of our result is 6. 
Result so far: 73969.66
Subtract 18 from 20 to 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.

The final outcome is 73969.66, with a leftover of 0.002.