We look at the division of 488504 by 1 
The aim is to understand the frequency of 1 in 488504.

On to step 1:
4 divided by 1 is 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 4 from 4 and we're left with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

On to step 2:
1 goes into 8 8 times with a remainder of 0.
The next digit of our result is 8. 
Result so far: 48.0
Subtract 8 from 8 to get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

Advancing to step 3:
When dividing 8 by 1, we get 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 488.0
Subtracting 8 from 8 leaves us with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 1

Going ahead to step 4:
The number 1 fits into 5 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 4885.0
Subtract 5 from 5 to get 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 1

Step 5:
1 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 48850.0
If we take 0 away from 0, we end up with 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 1

Moving on to step 6:
If we divide 4 by 1, we get 4 and a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 488504.0
If we take 4 away from 4, 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:
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: 488504.0
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.

Let's proceed to step 8:
1 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 488504.0
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.

After the division, we end up with 488504.0 and a remainder of 0.0.