121109 divided by 4 
The aim is to understand the frequency of 4 in 121109.

Moving on to step 1:
The number 4 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 4

Moving on to step 2:
When dividing 12 by 4, we get 3 with a remainder of 0.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 12 from 12 leaves us with 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 4

Step 3:
The number 4 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 30.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 4

Going ahead to step 4:
When dividing 11 by 4, we get 2 with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 302.0
Subtract 8 from 11 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 4

Let's proceed to step 5:
4 can be fit into 30 7 times, resulting in a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 3027.0
Subtracting 28 from 30 leaves us with 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 4

Step 6:
The number 4 fits into 29 7 times, leaving a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 30277.0
Subtract 28 from 29 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
10 divided by 4 is 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 30277.2
If we subtract 8 from 10, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
The number 4 fits into 20 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 30277.25
Subtract 20 from 20 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 9:
4 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 30277.25
If we subtract 0 from 0, we 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.

Step 10:
If we divide 0 by 4, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 30277.25
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.

Our division results in 30277.25 with a remaining 0.0.