Let's divide 871722 by 1
The aim is to understand the frequency of 1 in 871722.

Moving on to step 1:
The number 1 fits into 8 8 times, leaving a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtracting 8 from 8 leaves us with 0.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 1

On to step 2:
If we divide 7 by 1, we get 7 and a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 87.0
If we take 7 away from 7, we end up with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 1

Let's proceed to step 3:
1 can be fit into 1 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 871.0
The remainder is 0 after subtracting 1 from 1.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 1

Advancing to step 4:
7 divided by 1 is 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 8717.0
Subtract 7 from 7 to get 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 1

Step 5:
1 goes into 2 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 87172.0
The remainder is 0 after subtracting 2 from 2.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 1

Moving on to step 6:
2 divided by 1 is 2 with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 871722.0
Subtract 2 from 2 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.

On to step 7:
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: 871722.0
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:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 871722.0
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.

After the division, we end up with 871722.0 and a remainder of 0.0.