We divide 323972 by 1
The aim is to understand the frequency of 1 in 323972.

Step 1:
1 can be fit into 3 3 times, resulting in a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 3 from 3 leaves us with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 1

Moving on to step 2:
1 goes into 2 2 times with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 32.0
Deduct 2 from 2 and we're left with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 1

Let's proceed to step 3:
If we divide 3 by 1, we get 3 and a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 323.0
Subtract 3 from 3 to get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 1

Let's proceed to step 4:
1 can be fit into 9 9 times, resulting in a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 3239.0
Subtracting 9 from 9 leaves us with 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 1

On to step 5:
7 divided by 1 is 7 with a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 32397.0
If we take 7 away from 7, we end up with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 1

Going ahead to step 6:
If we divide 2 by 1, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 323972.0
If we take 2 away from 2, we end up 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:
0 divided by 1 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 323972.0
If we take 0 away from 0, we end up 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.

Going ahead to step 8:
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: 323972.0
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.

Our division results in 323972.0 with a remaining 0.0.