We're dividing 403813 by 1 
The aim is to understand the frequency of 1 in 403813.

Moving on to step 1:
The number 1 fits into 4 4 times, leaving a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 4 away from 4, we end up with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 1

Moving on to step 2:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 40.0
Subtracting 0 from 0 leaves us with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 1

On to step 3:
If we divide 3 by 1, we get 3 and a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 403.0
Deduct 3 from 3 and we're left with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 1

Step 4:
When dividing 8 by 1, we get 8 with a remainder of 0.
The next digit of our result is 8. 
Result so far: 4038.0
Subtract 8 from 8 to get 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

Advancing to step 5:
If we divide 1 by 1, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 40381.0
If we take 1 away from 1, we end up with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 1

Going ahead to step 6:
The number 1 fits into 3 3 times, leaving a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 403813.0
If we take 3 away from 3, 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:
When dividing 0 by 1, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 403813.0
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.

On to step 8:
0 divided by 1 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 403813.0
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.

The quotient of the division is 403813.0, and the remainder is 0.0.