3881 ÷ 1 
The aim is to understand the frequency of 1 in 3881.

On to step 1:
When dividing 3 by 1, we get 3 with a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 3 from 3 leaves us with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

Step 2:
The number 1 fits into 8 8 times, leaving a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
The remainder is 0 after subtracting 8 from 8.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 1

Let's proceed to step 3:
8 divided by 1 is 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 388.0
Subtracting 8 from 8 leaves us with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

Step 4:
The number 1 fits into 1 1 times, leaving a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 3881.0
The remainder is 0 after subtracting 1 from 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 5:
0 divided by 1 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 3881.0
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.

Let's proceed to step 6:
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: 3881.0
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 3881.0 with a remaining 0.0.