558423 divided by 1 
The aim is to understand the frequency of 1 in 558423.

Advancing to step 1:
The number 1 fits into 5 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we subtract 5 from 5, we get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 1

Let's proceed to step 2:
The number 1 fits into 5 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 55.0
The remainder is 0 after subtracting 5 from 5.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 1

On to step 3:
1 goes into 8 8 times with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 558.0
If we subtract 8 from 8, we get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 1

Step 4:
1 can be fit into 4 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 5584.0
Subtracting 4 from 4 leaves us with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 1

Let's proceed to step 5:
2 divided by 1 is 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 55842.0
If we take 2 away from 2, we end up with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 1

Moving on to step 6:
When dividing 3 by 1, we get 3 with a remainder of 0.
The next digit of our result is 3. 
Result so far: 558423.0
If we take 3 away from 3, 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 7:
The number 1 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 558423.0
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.

Let's proceed to step 8:
When dividing 0 by 1, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 558423.0
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 558423.0, with a leftover of 0.0.