Let's divide 91431414 by 1
The aim is to understand the frequency of 1 in 91431414.

On to step 1:
When dividing 9 by 1, we get 9 with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we take 9 away from 9, we end up with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

Advancing to step 2:
If we divide 1 by 1, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 91.0
If we take 1 away from 1, we end up with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 1

Step 3:
If we divide 4 by 1, we get 4 and a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 914.0
If we subtract 4 from 4, we get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 1

Going ahead to step 4:
3 divided by 1 is 3 with a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 9143.0
Subtract 3 from 3 to get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 1

Moving on to step 5:
1 divided by 1 is 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 91431.0
The remainder is 0 after subtracting 1 from 1.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 1

Let's proceed to step 6:
When dividing 4 by 1, we get 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 914314.0
The remainder is 0 after subtracting 4 from 4.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 1

Step 7:
1 goes into 1 1 times with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 9143141.0
Subtract 1 from 1 to get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 1

On to step 8:
If we divide 4 by 1, we get 4 and a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 91431414.0
The remainder is 0 after subtracting 4 from 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
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: 91431414.0
Subtracting 0 from 0 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.

Moving on to step 10:
When dividing 0 by 1, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 91431414.0
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 91431414.0 and a remainder of 0.0.