49990749 ÷ 505 
The aim is to understand the frequency of 505 in 49990749.

Advancing to step 1:
505 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 505

Let's proceed to step 2:
The number 505 fits into 49 0 times, leaving a remainder of 49.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 49 after subtracting 0 from 49.
Bring next digit (9) of the dividend behind the 49 and repeat the process: 499 / 505

Step 3:
If we divide 499 by 505, we get 0 and a remainder of 499.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 499 to get 499.
Bring next digit (9) of the dividend behind the 499 and repeat the process: 4999 / 505

Advancing to step 4:
When dividing 4999 by 505, we get 9 with a remainder of 454.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 454 after subtracting 4545 from 4999.
Include the next digit (0) from the dividend after 454, then repeat: 4540 / 505

Advancing to step 5:
505 can be fit into 4540 8 times, resulting in a remainder of 500.
Write down 8 as next digit of the result. 
Result so far: 98.0
Deduct 4040 from 4540 and we're left with 500.
Grab the next digit (7) from the dividend, add it to 500, then carry on: 5007 / 505

Step 6:
5007 divided by 505 is 9 with a remainder of 462.
The next digit of our result is 9. 
Result so far: 989.0
Subtracting 4545 from 5007 leaves us with 462.
Bring next digit (4) of the dividend behind the 462 and repeat the process: 4624 / 505

On to step 7:
When dividing 4624 by 505, we get 9 with a remainder of 79.
Put 9 as the next digit of the answer. 
Result so far: 9899.0
If we subtract 4545 from 4624, we get 79.
Bring next digit (9) of the dividend behind the 79 and repeat the process: 799 / 505

Let's proceed to step 8:
If we divide 799 by 505, we get 1 and a remainder of 294.
The number 1 becomes the next digit in our result. 
Result so far: 98991.0
If we take 505 away from 799, we end up with 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Going ahead to step 9:
2940 divided by 505 is 5 with a remainder of 415.
The number 5 becomes the next digit in our result. 
Result so far: 98991.5
Subtract 2525 from 2940 to get 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Step 10:
505 goes into 4150 8 times with a remainder of 110.
The next digit of our result is 8. 
Result so far: 98991.58
If we take 4040 away from 4150, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 11:
If we divide 1100 by 505, we get 2 and a remainder of 90.
Put 2 as the next digit of the answer. 
Result so far: 98991.582
If we take 1010 away from 1100, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 12:
If we divide 900 by 505, we get 1 and a remainder of 395.
Use 1 as the next digit of our solution. 
Result so far: 98991.5821
If we subtract 505 from 900, we get 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Step 13:
505 goes into 3950 7 times with a remainder of 415.
The number 7 becomes the next digit in our result. 
Result so far: 98991.58217
Subtracting 3535 from 3950 leaves us with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Moving on to step 14:
When dividing 4150 by 505, we get 8 with a remainder of 110.
Put 8 as the next digit of the answer. 
Result so far: 98991.582178
If we subtract 4040 from 4150, we get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 15:
505 can be fit into 1100 2 times, resulting in a remainder of 90.
Use 2 as the next digit of our solution. 
Result so far: 98991.5821782
If we subtract 1010 from 1100, we get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 16:
If we divide 900 by 505, we get 1 and a remainder of 395.
The number 1 becomes the next digit in our result. 
Result so far: 98991.58217821
Deduct 505 from 900 and we're left with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

The final result is 98991.58217821 with a remainder of 3.95e-07.