We look at the division of 109213 by 4 
The aim is to understand the frequency of 4 in 109213.

Advancing to step 1:
The number 4 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 4

Advancing to step 2:
4 can be fit into 10 2 times, resulting in a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 8 from 10 leaves us with 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 4

Going ahead to step 3:
4 goes into 29 7 times with a remainder of 1.
The next digit of our result is 7. 
Result so far: 27.0
Deduct 28 from 29 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 4

Step 4:
4 can be fit into 12 3 times, resulting in a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 273.0
Subtracting 12 from 12 leaves us with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 4

Moving on to step 5:
When dividing 1 by 4, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 2730.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 4

On to step 6:
The number 4 fits into 13 3 times, leaving a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 27303.0
If we take 12 away from 13, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
When dividing 10 by 4, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 27303.2
Deduct 8 from 10 and we're left with 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:
4 can be fit into 20 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 27303.25
The remainder is 0 after subtracting 20 from 20.
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:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 27303.25
Subtract 0 from 0 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 10:
When dividing 0 by 4, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 27303.25
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.

After the division, we end up with 27303.25 and a remainder of 0.0.