Let's divide 543672 by 1
The aim is to understand the frequency of 1 in 543672.

Advancing to step 1:
5 divided by 1 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 5 from 5 and we're left with 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 1

Advancing to step 2:
If we divide 4 by 1, we get 4 and a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 54.0
Subtracting 4 from 4 leaves us with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 1

Step 3:
If we divide 3 by 1, we get 3 and a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 543.0
The remainder is 0 after subtracting 3 from 3.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 1

Going ahead to step 4:
When dividing 6 by 1, we get 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 5436.0
Subtracting 6 from 6 leaves us with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 1

On to step 5:
The number 1 fits into 7 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 54367.0
Subtract 7 from 7 to get 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 1

Step 6:
1 can be fit into 2 2 times, resulting in a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 543672.0
Subtracting 2 from 2 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.

On to step 7:
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: 543672.0
The remainder is 0 after subtracting 0 from 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:
0 divided by 1 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 543672.0
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 543672.0, with a leftover of 0.0.