349389 divided by 28 
The aim is to understand the frequency of 28 in 349389.

Moving on to step 1:
3 divided by 28 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 28

Advancing to step 2:
When dividing 34 by 28, we get 1 with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 28 away from 34, we end up with 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 28

Let's proceed to step 3:
If we divide 69 by 28, we get 2 and a remainder of 13.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we subtract 56 from 69, we get 13.
Grab the next digit (3) from the dividend, add it to 13, then carry on: 133 / 28

Advancing to step 4:
The number 28 fits into 133 4 times, leaving a remainder of 21.
The number 4 becomes the next digit in our result. 
Result so far: 124.0
The remainder is 21 after subtracting 112 from 133.
Include the next digit (8) from the dividend after 21, then repeat: 218 / 28

On to step 5:
When dividing 218 by 28, we get 7 with a remainder of 22.
Use 7 as the next digit of our solution. 
Result so far: 1247.0
If we subtract 196 from 218, we get 22.
Take the next digit (9) from the dividend and append it to 22, then repeat: 229 / 28

On to step 6:
28 can be fit into 229 8 times, resulting in a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 12478.0
Subtracting 224 from 229 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
28 goes into 50 1 times with a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 12478.1
Subtracting 28 from 50 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 8:
When dividing 220 by 28, we get 7 with a remainder of 24.
The number 7 becomes the next digit in our result. 
Result so far: 12478.17
If we take 196 away from 220, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 9:
28 can be fit into 240 8 times, resulting in a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 12478.178
Subtracting 224 from 240 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
28 can be fit into 160 5 times, resulting in a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 12478.1785
Subtract 140 from 160 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 11:
28 goes into 200 7 times with a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 12478.17857
If we subtract 196 from 200, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 12:
If we divide 40 by 28, we get 1 and a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 12478.178571
Subtracting 28 from 40 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 13:
120 divided by 28 is 4 with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 12478.1785714
The remainder is 8 after subtracting 112 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 14:
28 goes into 80 2 times with a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 12478.17857142
Deduct 56 from 80 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

After the division, we end up with 12478.17857142 and a remainder of 2.4e-08.