28104885 ÷ 505 
The aim is to understand the frequency of 505 in 28104885.

On to step 1:
If we divide 2 by 505, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 505

On to step 2:
505 goes into 28 0 times with a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Take the next digit (1) from the dividend and append it to 28, then repeat: 281 / 505

Advancing to step 3:
505 goes into 281 0 times with a remainder of 281.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 281 after subtracting 0 from 281.
Fetch the next digit (0) from the dividend, attach it to 281 and continue: 2810 / 505

Let's proceed to step 4:
2810 divided by 505 is 5 with a remainder of 285.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 2525 from 2810 leaves us with 285.
Append the next digit (4) from the dividend to 285 and continue with: 2854 / 505

Let's proceed to step 5:
The number 505 fits into 2854 5 times, leaving a remainder of 329.
Use 5 as the next digit of our solution. 
Result so far: 55.0
If we subtract 2525 from 2854, we get 329.
Take the next digit (8) from the dividend and append it to 329, then repeat: 3298 / 505

Step 6:
When dividing 3298 by 505, we get 6 with a remainder of 268.
Put 6 as the next digit of the answer. 
Result so far: 556.0
If we take 3030 away from 3298, we end up with 268.
Include the next digit (8) from the dividend after 268, then repeat: 2688 / 505

Going ahead to step 7:
505 goes into 2688 5 times with a remainder of 163.
The number 5 becomes the next digit in our result. 
Result so far: 5565.0
The remainder is 163 after subtracting 2525 from 2688.
Take the next digit (5) from the dividend and append it to 163, then repeat: 1635 / 505

On to step 8:
When dividing 1635 by 505, we get 3 with a remainder of 120.
Write down 3 as next digit of the result. 
Result so far: 55653.0
The remainder is 120 after subtracting 1515 from 1635.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 9:
When dividing 1200 by 505, we get 2 with a remainder of 190.
Write down 2 as next digit of the result. 
Result so far: 55653.2
If we subtract 1010 from 1200, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 10:
1900 divided by 505 is 3 with a remainder of 385.
Put 3 as the next digit of the answer. 
Result so far: 55653.23
Subtract 1515 from 1900 to get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Going ahead to step 11:
505 goes into 3850 7 times with a remainder of 315.
Put 7 as the next digit of the answer. 
Result so far: 55653.237
Deduct 3535 from 3850 and we're left with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Advancing to step 12:
When dividing 3150 by 505, we get 6 with a remainder of 120.
Use 6 as the next digit of our solution. 
Result so far: 55653.2376
If we take 3030 away from 3150, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 13:
The number 505 fits into 1200 2 times, leaving a remainder of 190.
Use 2 as the next digit of our solution. 
Result so far: 55653.23762
If we take 1010 away from 1200, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 14:
When dividing 1900 by 505, we get 3 with a remainder of 385.
The number 3 becomes the next digit in our result. 
Result so far: 55653.237623
If we subtract 1515 from 1900, we get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Advancing to step 15:
The number 505 fits into 3850 7 times, leaving a remainder of 315.
Write down 7 as next digit of the result. 
Result so far: 55653.2376237
The remainder is 315 after subtracting 3535 from 3850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Going ahead to step 16:
When dividing 3150 by 505, we get 6 with a remainder of 120.
The number 6 becomes the next digit in our result. 
Result so far: 55653.23762376
If we subtract 3030 from 3150, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

After the division, we end up with 55653.23762376 and a remainder of 1.2e-07.