409891 ÷ 50 
The aim is to understand the frequency of 50 in 409891.

On to step 1:
50 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 50

Moving on to step 2:
When dividing 40 by 50, we get 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Take the next digit (9) from the dividend and append it to 40, then repeat: 409 / 50

Step 3:
50 can be fit into 409 8 times, resulting in a remainder of 9.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 9 after subtracting 400 from 409.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 50

On to step 4:
98 divided by 50 is 1 with a remainder of 48.
Put 1 as the next digit of the answer. 
Result so far: 81.0
Deduct 50 from 98 and we're left with 48.
Fetch the next digit (9) from the dividend, attach it to 48 and continue: 489 / 50

Let's proceed to step 5:
If we divide 489 by 50, we get 9 and a remainder of 39.
The number 9 becomes the next digit in our result. 
Result so far: 819.0
If we take 450 away from 489, we end up with 39.
Append the next digit (1) from the dividend to 39 and continue with: 391 / 50

Step 6:
When dividing 391 by 50, we get 7 with a remainder of 41.
The next digit of our result is 7. 
Result so far: 8197.0
Deduct 350 from 391 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 7:
The number 50 fits into 410 8 times, leaving a remainder of 10.
The next digit of our result is 8. 
Result so far: 8197.8
Subtracting 400 from 410 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
The number 50 fits into 100 2 times, leaving a remainder of 0.
The next digit of our result is 2. 
Result so far: 8197.82
Subtracting 100 from 100 leaves us 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.

Moving on to step 9:
When dividing 0 by 50, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8197.82
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.

On to step 10:
50 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 8197.82
Deduct 0 from 0 and we're left 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.

The final result is 8197.82 with a remainder of 0.0.