We look at the division of 50505383 by 816 
The aim is to understand the frequency of 816 in 50505383.

Step 1:
816 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 816

Let's proceed to step 2:
50 divided by 816 is 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Include the next digit (5) from the dividend after 50, then repeat: 505 / 816

Advancing to step 3:
505 divided by 816 is 0 with a remainder of 505.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 505, we end up with 505.
Append the next digit (0) from the dividend to 505 and continue with: 5050 / 816

Advancing to step 4:
The number 816 fits into 5050 6 times, leaving a remainder of 154.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 4896 from 5050 leaves us with 154.
Append the next digit (5) from the dividend to 154 and continue with: 1545 / 816

Step 5:
If we divide 1545 by 816, we get 1 and a remainder of 729.
The number 1 becomes the next digit in our result. 
Result so far: 61.0
Deduct 816 from 1545 and we're left with 729.
Take the next digit (3) from the dividend and append it to 729, then repeat: 7293 / 816

On to step 6:
When dividing 7293 by 816, we get 8 with a remainder of 765.
Write down 8 as next digit of the result. 
Result so far: 618.0
Deduct 6528 from 7293 and we're left with 765.
Append the next digit (8) from the dividend to 765 and continue with: 7658 / 816

Advancing to step 7:
The number 816 fits into 7658 9 times, leaving a remainder of 314.
Use 9 as the next digit of our solution. 
Result so far: 6189.0
The remainder is 314 after subtracting 7344 from 7658.
Take the next digit (3) from the dividend and append it to 314, then repeat: 3143 / 816

On to step 8:
816 goes into 3143 3 times with a remainder of 695.
Use 3 as the next digit of our solution. 
Result so far: 61893.0
If we take 2448 away from 3143, we end up with 695.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6950, and continue the process.

Going ahead to step 9:
6950 divided by 816 is 8 with a remainder of 422.
Use 8 as the next digit of our solution. 
Result so far: 61893.8
Deduct 6528 from 6950 and we're left with 422.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

Advancing to step 10:
When dividing 4220 by 816, we get 5 with a remainder of 140.
Use 5 as the next digit of our solution. 
Result so far: 61893.85
If we take 4080 away from 4220, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 11:
If we divide 1400 by 816, we get 1 and a remainder of 584.
Write down 1 as next digit of the result. 
Result so far: 61893.851
If we take 816 away from 1400, we end up with 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Moving on to step 12:
816 goes into 5840 7 times with a remainder of 128.
Use 7 as the next digit of our solution. 
Result so far: 61893.8517
Subtract 5712 from 5840 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 13:
1280 divided by 816 is 1 with a remainder of 464.
The number 1 becomes the next digit in our result. 
Result so far: 61893.85171
Deduct 816 from 1280 and we're left with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Going ahead to step 14:
The number 816 fits into 4640 5 times, leaving a remainder of 560.
Record the quotient 5 as the next digit in the result. 
Result so far: 61893.851715
Subtracting 4080 from 4640 leaves us with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Advancing to step 15:
The number 816 fits into 5600 6 times, leaving a remainder of 704.
Use 6 as the next digit of our solution. 
Result so far: 61893.8517156
Subtract 4896 from 5600 to get 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

On to step 16:
7040 divided by 816 is 8 with a remainder of 512.
The next digit of our result is 8. 
Result so far: 61893.85171568
If we subtract 6528 from 7040, we get 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

After the division, we end up with 61893.85171568 and a remainder of 5.12e-07.