502869 divided by 1 
The aim is to understand the frequency of 1 in 502869.

Step 1:
The number 1 fits into 5 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 0 after subtracting 5 from 5.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 1

Let's proceed to step 2:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 50.0
Subtract 0 from 0 to get 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 1

Moving on to step 3:
1 can be fit into 2 2 times, resulting in a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 502.0
If we subtract 2 from 2, we get 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 1

Advancing to step 4:
1 goes into 8 8 times with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 5028.0
Deduct 8 from 8 and we're left with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

Advancing to step 5:
If we divide 6 by 1, we get 6 and a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 50286.0
Subtracting 6 from 6 leaves us with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 1

On to step 6:
1 can be fit into 9 9 times, resulting in a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 502869.0
If we take 9 away from 9, 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.

On to step 7:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 502869.0
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:
0 divided by 1 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 502869.0
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.

In conclusion, the division gives 502869.0 with a balance of 0.0.