Let's divide 91819223 by 4
The aim is to understand the frequency of 4 in 91819223.

Let's proceed to step 1:
If we divide 9 by 4, we get 2 and a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 8 from 9 to get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 4

Step 2:
4 goes into 11 2 times with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 22.0
Subtracting 8 from 11 leaves us with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 4

Let's proceed to step 3:
When dividing 38 by 4, we get 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 229.0
If we subtract 36 from 38, we get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 4

Step 4:
When dividing 21 by 4, we get 5 with a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 2295.0
If we subtract 20 from 21, we get 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 4

Advancing to step 5:
The number 4 fits into 19 4 times, leaving a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 22954.0
If we subtract 16 from 19, we get 3.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 4

Step 6:
32 divided by 4 is 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 229548.0
Deduct 32 from 32 and we're left with 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 4

Let's proceed to step 7:
When dividing 2 by 4, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 2295480.0
If we subtract 0 from 2, we get 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 4

Let's proceed to step 8:
If we divide 23 by 4, we get 5 and a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 22954805.0
If we take 20 away from 23, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
4 can be fit into 30 7 times, resulting in a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 22954805.7
Subtract 28 from 30 to 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.

Moving on to step 10:
20 divided by 4 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 22954805.75
If we take 20 away from 20, 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.

On to step 11:
The number 4 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 22954805.75
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 12:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 22954805.75
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.

Our division results in 22954805.75 with a remaining 0.0.