We divide 726621 by 1
The aim is to understand the frequency of 1 in 726621.

Let's proceed to step 1:
The number 1 fits into 7 7 times, leaving a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 7 away from 7, we end up with 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 1

Step 2:
2 divided by 1 is 2 with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 72.0
If we subtract 2 from 2, we get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

On to step 3:
If we divide 6 by 1, we get 6 and a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 726.0
If we take 6 away from 6, we end up with 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 1

On to step 4:
6 divided by 1 is 6 with a remainder of 0.
The next digit of our result is 6. 
Result so far: 7266.0
The remainder is 0 after subtracting 6 from 6.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 1

Step 5:
2 divided by 1 is 2 with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 72662.0
Subtracting 2 from 2 leaves us with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 1

Moving on to step 6:
1 divided by 1 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 726621.0
Subtract 1 from 1 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.

Going ahead to step 7:
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: 726621.0
If we take 0 away from 0, 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.

Advancing to step 8:
0 divided by 1 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 726621.0
The remainder is 0 after subtracting 0 from 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 final result is 726621.0 with a remainder of 0.0.