Let's divide 573378 by 1
The aim is to understand the frequency of 1 in 573378.

Going ahead to step 1:
If we divide 5 by 1, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we subtract 5 from 5, we get 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 1

Going ahead to step 2:
When dividing 7 by 1, we get 7 with a remainder of 0.
The next digit of our result is 7. 
Result so far: 57.0
Deduct 7 from 7 and we're left with 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 1

Moving on to step 3:
3 divided by 1 is 3 with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 573.0
If we take 3 away from 3, we end up with 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 1

Moving on to step 4:
1 can be fit into 3 3 times, resulting in a remainder of 0.
The next digit of our result is 3. 
Result so far: 5733.0
Subtract 3 from 3 to get 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 1

Advancing to step 5:
7 divided by 1 is 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 57337.0
If we subtract 7 from 7, we get 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 1

Step 6:
1 can be fit into 8 8 times, resulting in a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 573378.0
Subtracting 8 from 8 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:
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: 573378.0
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.

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: 573378.0
Deduct 0 from 0 and we're left 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.

Our division results in 573378.0 with a remaining 0.0.