We're dividing 50407 by 28 
The aim is to understand the frequency of 28 in 50407.

Advancing to step 1:
28 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 28

On to step 2:
If we divide 50 by 28, we get 1 and a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 28 from 50 and we're left with 22.
Include the next digit (4) from the dividend after 22, then repeat: 224 / 28

Advancing to step 3:
28 goes into 224 8 times with a remainder of 0.
The next digit of our result is 8. 
Result so far: 18.0
Subtract 224 from 224 to get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 28

Going ahead to step 4:
0 divided by 28 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 180.0
The remainder is 0 after subtracting 0 from 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 28

On to step 5:
28 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 1800.0
Deduct 0 from 7 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 6:
28 goes into 70 2 times with a remainder of 14.
The next digit of our result is 2. 
Result so far: 1800.2
If we take 56 away from 70, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
If we divide 140 by 28, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1800.25
Subtract 140 from 140 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 8:
The number 28 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1800.25
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
When dividing 0 by 28, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1800.25
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.

The final result is 1800.25 with a remainder of 0.0.