We divide 409321 by 1
The aim is to understand the frequency of 1 in 409321.

Going ahead to step 1:
1 can be fit into 4 4 times, resulting in a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 4 from 4 to get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 1

On to step 2:
If we divide 0 by 1, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 40.0
The remainder is 0 after subtracting 0 from 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 1

Moving on to step 3:
When dividing 9 by 1, we get 9 with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 409.0
Deduct 9 from 9 and we're left with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 1

Moving on to step 4:
1 goes into 3 3 times with a remainder of 0.
The next digit of our result is 3. 
Result so far: 4093.0
The remainder is 0 after subtracting 3 from 3.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 1

On to step 5:
1 goes into 2 2 times with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 40932.0
Deduct 2 from 2 and we're left with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

Let's proceed to step 6:
1 goes into 1 1 times with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 409321.0
Subtract 1 from 1 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.

Moving on to step 7:
If we divide 0 by 1, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 409321.0
If we subtract 0 from 0, we 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.

Advancing to step 8:
1 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 409321.0
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.

After the division, we end up with 409321.0 and a remainder of 0.0.