4924549 divided by 521 
The aim is to understand the frequency of 521 in 4924549.

Going ahead to step 1:
If we divide 4 by 521, we get 0 and a remainder of 4.
Write down 0 as next digit of 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 / 521

Going ahead to step 2:
49 divided by 521 is 0 with a remainder of 49.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 49 and we're left with 49.
Append the next digit (2) from the dividend to 49 and continue with: 492 / 521

Advancing to step 3:
492 divided by 521 is 0 with a remainder of 492.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 492 after subtracting 0 from 492.
Include the next digit (4) from the dividend after 492, then repeat: 4924 / 521

On to step 4:
The number 521 fits into 4924 9 times, leaving a remainder of 235.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 235 after subtracting 4689 from 4924.
Bring next digit (5) of the dividend behind the 235 and repeat the process: 2355 / 521

Step 5:
When dividing 2355 by 521, we get 4 with a remainder of 271.
Record the quotient 4 as the next digit in the result. 
Result so far: 94.0
The remainder is 271 after subtracting 2084 from 2355.
Take the next digit (4) from the dividend and append it to 271, then repeat: 2714 / 521

Going ahead to step 6:
The number 521 fits into 2714 5 times, leaving a remainder of 109.
Put 5 as the next digit of the answer. 
Result so far: 945.0
Subtract 2605 from 2714 to get 109.
Append the next digit (9) from the dividend to 109 and continue with: 1099 / 521

Going ahead to step 7:
When dividing 1099 by 521, we get 2 with a remainder of 57.
Write down 2 as next digit of the result. 
Result so far: 9452.0
Deduct 1042 from 1099 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 8:
The number 521 fits into 570 1 times, leaving a remainder of 49.
The number 1 becomes the next digit in our result. 
Result so far: 9452.1
Deduct 521 from 570 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 9:
490 divided by 521 is 0 with a remainder of 490.
Use 0 as the next digit of our solution. 
Result so far: 9452.1
If we subtract 0 from 490, we get 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Let's proceed to step 10:
521 can be fit into 4900 9 times, resulting in a remainder of 211.
Put 9 as the next digit of the answer. 
Result so far: 9452.109
If we subtract 4689 from 4900, we get 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Step 11:
521 goes into 2110 4 times with a remainder of 26.
The next digit of our result is 4. 
Result so far: 9452.1094
Deduct 2084 from 2110 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 12:
521 can be fit into 260 0 times, resulting in a remainder of 260.
Write down 0 as next digit of the result. 
Result so far: 9452.1094
The remainder is 260 after subtracting 0 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Moving on to step 13:
When dividing 2600 by 521, we get 4 with a remainder of 516.
The next digit of our result is 4. 
Result so far: 9452.109404
If we subtract 2084 from 2600, we get 516.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5160, and continue the process.

On to step 14:
5160 divided by 521 is 9 with a remainder of 471.
The number 9 becomes the next digit in our result. 
Result so far: 9452.1094049
If we take 4689 away from 5160, we end up with 471.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4710, and continue the process.

Moving on to step 15:
521 goes into 4710 9 times with a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 9452.10940499
If we subtract 4689 from 4710, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

The final result is 9452.10940499 with a remainder of 2.1e-08.