531880 ÷ 1 
The aim is to understand the frequency of 1 in 531880.

On to step 1:
5 divided by 1 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we take 5 away from 5, we end up with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 1

Step 2:
1 can be fit into 3 3 times, resulting in a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
Deduct 3 from 3 and we're left with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 1

Advancing to step 3:
The number 1 fits into 1 1 times, leaving a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 531.0
Subtract 1 from 1 to get 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 1

Step 4:
The number 1 fits into 8 8 times, leaving a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 5318.0
Subtracting 8 from 8 leaves us with 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 1

Advancing to step 5:
If we divide 8 by 1, we get 8 and a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 53188.0
Deduct 8 from 8 and we're left with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 1

Let's proceed to step 6:
The number 1 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 531880.0
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 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: 531880.0
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.

Going ahead to 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: 531880.0
Subtract 0 from 0 to 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 531880.0 with a remaining 0.0.