Let's divide 401910 by 28
The aim is to understand the frequency of 28 in 401910.

Advancing to step 1:
When dividing 4 by 28, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 28

Advancing to step 2:
28 goes into 40 1 times with a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 12 after subtracting 28 from 40.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 28

Moving on to step 3:
When dividing 121 by 28, we get 4 with a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
The remainder is 9 after subtracting 112 from 121.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 28

Moving on to step 4:
99 divided by 28 is 3 with a remainder of 15.
The next digit of our result is 3. 
Result so far: 143.0
The remainder is 15 after subtracting 84 from 99.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 28

Advancing to step 5:
28 goes into 151 5 times with a remainder of 11.
Put 5 as the next digit of the answer. 
Result so far: 1435.0
If we subtract 140 from 151, we get 11.
Fetch the next digit (0) from the dividend, attach it to 11 and continue: 110 / 28

Let's proceed to step 6:
When dividing 110 by 28, we get 3 with a remainder of 26.
Record the quotient 3 as the next digit in the result. 
Result so far: 14353.0
Deduct 84 from 110 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 7:
When dividing 260 by 28, we get 9 with a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 14353.9
Subtract 252 from 260 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 8:
If we divide 80 by 28, we get 2 and a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 14353.92
The remainder is 24 after subtracting 56 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 9:
28 goes into 240 8 times with a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 14353.928
Subtract 224 from 240 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
The number 28 fits into 160 5 times, leaving a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 14353.9285
Subtracting 140 from 160 leaves us with 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:
200 divided by 28 is 7 with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 14353.92857
If we take 196 away from 200, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
If we divide 40 by 28, we get 1 and a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 14353.928571
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.

Going ahead to step 13:
28 can be fit into 120 4 times, resulting in a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 14353.9285714
Deduct 112 from 120 and we're left with 8.
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:
When dividing 80 by 28, we get 2 with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 14353.92857142
Subtracting 56 from 80 leaves us 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.

The final result is 14353.92857142 with a remainder of 2.4e-08.