14254129 ÷ 521 
The aim is to understand the frequency of 521 in 14254129.

On to step 1:
If we divide 1 by 521, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 521

Let's proceed to step 2:
14 divided by 521 is 0 with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 14, we get 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 521

Advancing to step 3:
521 can be fit into 142 0 times, resulting in a remainder of 142.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 142 after subtracting 0 from 142.
Grab the next digit (5) from the dividend, add it to 142, then carry on: 1425 / 521

Advancing to step 4:
521 can be fit into 1425 2 times, resulting in a remainder of 383.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 1042 from 1425 and we're left with 383.
Take the next digit (4) from the dividend and append it to 383, then repeat: 3834 / 521

Moving on to step 5:
521 can be fit into 3834 7 times, resulting in a remainder of 187.
The next digit of our result is 7. 
Result so far: 27.0
Subtract 3647 from 3834 to get 187.
Include the next digit (1) from the dividend after 187, then repeat: 1871 / 521

On to step 6:
If we divide 1871 by 521, we get 3 and a remainder of 308.
The number 3 becomes the next digit in our result. 
Result so far: 273.0
Subtracting 1563 from 1871 leaves us with 308.
Include the next digit (2) from the dividend after 308, then repeat: 3082 / 521

Let's proceed to step 7:
When dividing 3082 by 521, we get 5 with a remainder of 477.
Write down 5 as next digit of the result. 
Result so far: 2735.0
Subtract 2605 from 3082 to get 477.
Fetch the next digit (9) from the dividend, attach it to 477 and continue: 4779 / 521

Step 8:
When dividing 4779 by 521, we get 9 with a remainder of 90.
The number 9 becomes the next digit in our result. 
Result so far: 27359.0
If we subtract 4689 from 4779, 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.

Let's proceed to step 9:
900 divided by 521 is 1 with a remainder of 379.
Write down 1 as next digit of the result. 
Result so far: 27359.1
If we take 521 away from 900, we end up with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Step 10:
If we divide 3790 by 521, we get 7 and a remainder of 143.
Record the quotient 7 as the next digit in the result. 
Result so far: 27359.17
The remainder is 143 after subtracting 3647 from 3790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Advancing to step 11:
If we divide 1430 by 521, we get 2 and a remainder of 388.
The next digit of our result is 2. 
Result so far: 27359.172
Subtract 1042 from 1430 to get 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Going ahead to step 12:
When dividing 3880 by 521, we get 7 with a remainder of 233.
The number 7 becomes the next digit in our result. 
Result so far: 27359.1727
Deduct 3647 from 3880 and we're left with 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Moving on to step 13:
521 can be fit into 2330 4 times, resulting in a remainder of 246.
Put 4 as the next digit of the answer. 
Result so far: 27359.17274
The remainder is 246 after subtracting 2084 from 2330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Advancing to step 14:
When dividing 2460 by 521, we get 4 with a remainder of 376.
Use 4 as the next digit of our solution. 
Result so far: 27359.172744
Subtract 2084 from 2460 to get 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

The quotient of the division is 27359.172744, and the remainder is 3.76e-05.