We're dividing 697621 by 1 
The aim is to understand the frequency of 1 in 697621.

Let's proceed to step 1:
When dividing 6 by 1, we get 6 with a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 6 from 6, we get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 1

Moving on to step 2:
The number 1 fits into 9 9 times, leaving a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 69.0
Deduct 9 from 9 and we're left with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 1

Moving on to step 3:
1 goes into 7 7 times with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 697.0
If we take 7 away from 7, we end up with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

Step 4:
If we divide 6 by 1, we get 6 and a remainder of 0.
The next digit of our result is 6. 
Result so far: 6976.0
Subtract 6 from 6 to get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 1

Advancing to step 5:
1 goes into 2 2 times with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 69762.0
If we take 2 away from 2, we end up 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 can be fit into 1 1 times, resulting in a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 697621.0
Subtracting 1 from 1 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.

Advancing to step 7:
If we divide 0 by 1, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 697621.0
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.

On to step 8:
When dividing 0 by 1, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 697621.0
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 697621.0 with a remainder of 0.0.