640248 divided by 1 
The aim is to understand the frequency of 1 in 640248.

Let's proceed to step 1:
6 divided by 1 is 6 with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtract 6 from 6 to get 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 1

Let's proceed to step 2:
When dividing 4 by 1, we get 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 64.0
Subtracting 4 from 4 leaves us with 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 1

Step 3:
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: 640.0
Subtract 0 from 0 to get 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 1

Advancing to step 4:
If we divide 2 by 1, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 6402.0
Subtract 2 from 2 to get 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 1

Let's proceed to step 5:
1 goes into 4 4 times with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 64024.0
If we subtract 4 from 4, we get 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 1

Moving on to step 6:
1 goes into 8 8 times with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 640248.0
If we take 8 away from 8, 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:
0 divided by 1 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 640248.0
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:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 640248.0
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.

Our division results in 640248.0 with a remaining 0.0.